Drilling or Fastening

The majority of angle grinders have a fixed speed. Most 4-½-inch models run at 10,000 or 11,000 rpm. The said, 7-inch and 9-inch models run between 5,000 and 8,000 rpm. A few angle grinders have variable speed and can run slow enough for polishing or buffing. Grinder's come in lots of different disc sizes, but the most common sizes are 115mm (4 ½”) and 230mm (9”). You can purchase different discs/heads/ wheels depending on the task you want to complete - just make sure they're the right size for your grinder! 4' (100mm) angle grinders, as the name suggests, accept grinding discs up to 100mm in size. These grinders are relatively small in size, and are suitable for smaller jobs. The size of disc that the grinder can accept dictates the depth of cut that the grinder can achieve. Complete various grinding applications and get fast material removal with the 9-in. 4HP Angle Grinder. Featuring a high-powered motor with overload protection, this grinder delivers 6,500 rpm for tough jobs. The GA9060 weighs only 5.5 Kg and is built with comfort and ergonomic features for extended use. The grinder features an ergonomic rubberised handle with trigger switch, and the gear housing can be positioned every 90 degrees for operator convenience.

The majority of angle grinders have a fixed speed. Most 4-½-inch models run at 10,000 or 11,000 rpm. The said, 7-inch and 9-inch models run between 5,000 and 8,000 rpm. A few angle grinders have variable speed and can run slow enough for polishing or buffing. Grinder's come in lots of different disc sizes, but the most common sizes are 115mm (4 ½”) and 230mm (9”). You can purchase different discs/heads/ wheels depending on the task you want to complete - just make sure they're the right size for your grinder! 4' (100mm) angle grinders, as the name suggests, accept grinding discs up to 100mm in size. These grinders are relatively small in size, and are suitable for smaller jobs. The size of disc that the grinder can accept dictates the depth of cut that the grinder can achieve. Complete various grinding applications and get fast material removal with the 9-in. 4HP Angle Grinder. Featuring a high-powered motor with overload protection, this grinder delivers 6,500 rpm for tough jobs. The GA9060 weighs only 5.5 Kg and is built with comfort and ergonomic features for extended use. The grinder features an ergonomic rubberised handle with trigger switch, and the gear housing can be positioned every 90 degrees for operator convenience.

Electronic variable speed for total control in any application Rounded ergonomic industrial design allows easy and comfortable handling in any application Improved sealing for maximum protection from dust ingress ensuring long tool life Output air slots designed to protect users

The D25810K 12 lb. SDS Max Demolition Hammer is an ultra-light high-performance chipping hammer powered by 10.5 amp motor. The dependable and hard-hitting German engineered mechanism, delivers 7.1 joules of impact energy. With Constant Speed Under Load electronics, the D25810K is ideally suited for all day work on concrete and masonry walls, floor and wall channeling, and removing plaster and tile from floors, walls and ceilings. The Active Vibration Control® technology employed delivers reduced user vibration for less user fatigue and greater productivity.

Highest productivity due to an optimum balance of power, impact energy and vibration50% longer service intervals than the nearest competitor for lower running costs and less down timeRobust and proven design provides the longest lasting 16kg breaker

The majority of angle grinders have a fixed speed. Most 4-½-inch models run at 10,000 or 11,000 rpm. The said, 7-inch and 9-inch models run between 5,000 and 8,000 rpm. A few angle grinders have variable speed and can run slow enough for polishing or buffing. Grinder's come in lots of different disc sizes, but the most common sizes are 115mm (4 ½”) and 230mm (9”). You can purchase different discs/heads/ wheels depending on the task you want to complete - just make sure they're the right size for your grinder! 4' (100mm) angle grinders, as the name suggests, accept grinding discs up to 100mm in size. These grinders are relatively small in size, and are suitable for smaller jobs. The size of disc that the grinder can accept dictates the depth of cut that the grinder can achieve. Complete various grinding applications and get fast material removal with the 9-in. 4HP Angle Grinder. Featuring a high-powered motor with overload protection, this grinder delivers 6,500 rpm for tough jobs. The GA9060 weighs only 5.5 Kg and is built with comfort and ergonomic features for extended use. The grinder features an ergonomic rubberised handle with trigger switch, and the gear housing can be positioned every 90 degrees for operator convenience.

IN BRIEF Demolition hammer with 1500W motor for highest efficiency in demolition. Chisel orientation into 12 preset positions. Power output 750W. Powerful and durable 1500 Watt motor delivers outstanding concrete breaking perfomance In line design for better handling and quick change chisel adjustment allows fast orientation of the chisel through 12 preset positions Magnesium housings ensure maximum durability and minimum weight Compact, streamlined design allows access in confined areas Large oversize hammer mechanism delivers extreme durability and excellent concrete breaking performance Ergonomic inline design ensures user comfort during any application Modular design allows for quick access to key compnents allowing for faster and cheaper servicing. Multi adjustable side handle can be located anywhere on the hammer barrel, maintaining user comfort in any application STANDARD Multi position side handle Heavy duty carrying case

Magnesium alloy housing guarantees highest strength and low weight soft start allows precise start of chiseling without wandering the chisel Quick change of chisel position - 12 different angle settings Strong impact mechanism ensures the highest strength among competitor devices and at the same time excellent chiseling parameters around the axis in 12 positions Ergonomic, linear shape guarantees comfort of use in every application Durable engine with a power of 1550 W for perfect chiselling results Vibration damping system (AVC) using a balancing weight and the so-called the floating handle enables the reduction of the triaxial resultant vibration. This allows you to significantly extend the permissible daily dose of working time without risk to the operator's health Modular design allows quick access to the main components and quick and cheaper service Point chisel Multi-position side handle

2 Speed Magnetic Drilling Machine

Description. The SDS-Max Professional Flat Chisel is intended for renovation, restoration and demolition. Shop SDS-Max chisels online at Ruwag for a versatile chisel bit that is compatible with SDS-Max shank systems. SDS chisels are ideal fo r heavy duty work in concrete, brick and masonry. Designed for use with an SDS machine, they have a break-resistant flute and a carbide tip for excellent strength and durability. Scaling chisels are idea l of cleaning concrete and removing scale and rust. Additionally, scaling chisels can be used for cutting troughs and some asphalt. The widened tip design allows for faster surface material removal. Our SDS products come in a selection of different types to ensure you have the exact bit for the job. Our collection contains high quality SDS chisels, including SDS Flat Chisels, SDS Pointed Chisels, SDS Tile Chisels, SDS Wide Chisels and SDS Gouging Chisels. The diameter of an SDS and SDS Plus shank is 10 millimeters. The difference is that SDS Plus have 4 splines in the shank tha t hold it more securely. Whereas the SDS Max is 18 millimeters. This means that SDS Max bits have an increased capability for tougher masonry work, withstanding more torque and force. Safety Data Sheets (SDS) provide critical information about the potential health and safety hazards of materials used in various industries. An SDS allows workers and emergency personnel to know the proper procedures for handling or working with a toxic or dangerous substance. Chisels have been used in various forms for thousands of years. However, despite the variety of different types, the basic use of a chisel remains the same. This hand-held tool features a distinctive cutting edge which is purpose-made for carving and cutting hard materials such as wood, stone, and metal.

Description. The SDS-Max Professional Flat Chisel is intended for renovation, restoration and demolition. Shop SDS-Max chisels online at Ruwag for a versatile chisel bit that is compatible with SDS-Max shank systems. SDS chisels are ideal fo r heavy duty work in concrete, brick and masonry. Designed for use with an SDS machine, they have a break-resistant flute and a carbide tip for excellent strength and durability. Scaling chisels are idea l of cleaning concrete and removing scale and rust. Additionally, scaling chisels can be used for cutting troughs and some asphalt. The widened tip design allows for faster surface material removal. Our SDS products come in a selection of different types to ensure you have the exact bit for the job. Our collection contains high quality SDS chisels, including SDS Flat Chisels, SDS Pointed Chisels, SDS Tile Chisels, SDS Wide Chisels and SDS Gouging Chisels. The diameter of an SDS and SDS Plus shank is 10 millimeters. The difference is that SDS Plus have 4 splines in the shank tha t hold it more securely. Whereas the SDS Max is 18 millimeters. This means that SDS Max bits have an increased capability for tougher masonry work, withstanding more torque and force. Safety Data Sheets (SDS) provide critical information about the potential health and safety hazards of materials used in various industries. An SDS allows workers and emergency personnel to know the proper procedures for handling or working with a toxic or dangerous substance. Chisels have been used in various forms for thousands of years. However, despite the variety of different types, the basic use of a chisel remains the same. This hand-held tool features a distinctive cutting edge which is purpose-made for carving and cutting hard materials such as wood, stone, and metal.

They are completely different ; impact drivers provide torsional (rotational) impulses which act to drive the fastener clockwise as the screw advances into the material, percussion (hammer drill) provides linear impulses along the axis of the bit that act to micro-shatter the substrate (typically masonry) being drilled . A hammer drill works at a lower stroke rate, but with significantly greater impact energy than a percussion drill. This enables work to be completed more quickly. Hammer drilling in concrete requires less force than percussion drilling. An impact drill uses lateral percussion (from the side, in a circular motion). Once the drill senses that torque is needed , the drill uses impact to twist the screw into the surface. In short, an impact drill is used for driving screws and bolts that require a higher torque. Impact drivers produce lots of rotational force, capable of driving the largest wood screws in seconds. Internal mechanisms allow impact drivers to produce more torque than drills, and in quick bursts. These bursts or “impacts” happen up to 50 times a second, giving impact drivers their name. Can you use an impact driver to drill into concrete? If you drill holes that are less than 1/4 inch, an impact driver can help drill through concrete and brick. These tools have a massive amount of torque. However, they are not built to be used like hammer or regular drills. Percussion drilling is the perfect choice if you need to execute drilling in hard soils. Hard soil has layers of rubble or stones and percussion drilling can effectively drill through it. It is suitable for research on soil pollution, grain size distribution, general soil classification, and profile description. Percussion drilling is a drilling method in which a heavy hammering or cutting bit is attached to a cable and inserted into the borehole. The heavy bit or hammer is repeatedly lifted and dropped, thus boring through the earth. The hammer is made of hardened steel with carbide on the chisel -shaped bit.

They are completely different ; impact drivers provide torsional (rotational) impulses which act to drive the fastener clockwise as the screw advances into the material, percussion (hammer drill) provides linear impulses along the axis of the bit that act to micro-shatter the substrate (typically masonry) being drilled . A hammer drill works at a lower stroke rate, but with significantly greater impact energy than a percussion drill. This enables work to be completed more quickly. Hammer drilling in concrete requires less force than percussion drilling. An impact drill uses lateral percussion (from the side, in a circular motion). Once the drill senses that torque is needed , the drill uses impact to twist the screw into the surface. In short, an impact drill is used for driving screws and bolts that require a higher torque. Impact drivers produce lots of rotational force, capable of driving the largest wood screws in seconds. Internal mechanisms allow impact drivers to produce more torque than drills, and in quick bursts. These bursts or “impacts” happen up to 50 times a second, giving impact drivers their name. Can you use an impact driver to drill into concrete? If you drill holes that are less than 1/4 inch, an impact driver can help drill through concrete and brick. These tools have a massive amount of torque. However, they are not built to be used like hammer or regular drills. Percussion drilling is the perfect choice if you need to execute drilling in hard soils. Hard soil has layers of rubble or stones and percussion drilling can effectively drill through it. It is suitable for research on soil pollution, grain size distribution, general soil classification, and profile description. Percussion drilling is a drilling method in which a heavy hammering or cutting bit is attached to a cable and inserted into the borehole. The heavy bit or hammer is repeatedly lifted and dropped, thus boring through the earth. The hammer is made of hardened steel with carbide on the chisel -shaped bit.

The majority of angle grinders have a fixed speed. Most 4-½-inch models run at 10,000 or 11,000 rpm. The said, 7-inch and 9-inch models run between 5,000 and 8,000 rpm. A few angle grinders have variable speed and can run slow enough for polishing or buffing. Grinder's come in lots of different disc sizes, but the most common sizes are 115mm (4 ½”) and 230mm (9”). You can purchase different discs/heads/ wheels depending on the task you want to complete - just make sure they're the right size for your grinder! 4' (100mm) angle grinders, as the name suggests, accept grinding discs up to 100mm in size. These grinders are relatively small in size, and are suitable for smaller jobs. The size of disc that the grinder can accept dictates the depth of cut that the grinder can achieve. Complete various grinding applications and get fast material removal with the 9-in. 4HP Angle Grinder. Featuring a high-powered motor with overload protection, this grinder delivers 6,500 rpm for tough jobs. The GA9060 weighs only 5.5 Kg and is built with comfort and ergonomic features for extended use. The grinder features an ergonomic rubberised handle with trigger switch, and the gear housing can be positioned every 90 degrees for operator convenience.

The majority of angle grinders have a fixed speed. Most 4-½-inch models run at 10,000 or 11,000 rpm. The said, 7-inch and 9-inch models run between 5,000 and 8,000 rpm. A few angle grinders have variable speed and can run slow enough for polishing or buffing. Grinder's come in lots of different disc sizes, but the most common sizes are 115mm (4 ½”) and 230mm (9”). You can purchase different discs/heads/ wheels depending on the task you want to complete - just make sure they're the right size for your grinder! 4' (100mm) angle grinders, as the name suggests, accept grinding discs up to 100mm in size. These grinders are relatively small in size, and are suitable for smaller jobs. The size of disc that the grinder can accept dictates the depth of cut that the grinder can achieve. Complete various grinding applications and get fast material removal with the 9-in. 4HP Angle Grinder. Featuring a high-powered motor with overload protection, this grinder delivers 6,500 rpm for tough jobs. The GA9060 weighs only 5.5 Kg and is built with comfort and ergonomic features for extended use. The grinder features an ergonomic rubberised handle with trigger switch, and the gear housing can be positioned every 90 degrees for operator convenience.

The majority of angle grinders have a fixed speed. Most 4-½-inch models run at 10,000 or 11,000 rpm. The said, 7-inch and 9-inch models run between 5,000 and 8,000 rpm. A few angle grinders have variable speed and can run slow enough for polishing or buffing. Grinder's come in lots of different disc sizes, but the most common sizes are 115mm (4 ½”) and 230mm (9”). You can purchase different discs/heads/ wheels depending on the task you want to complete - just make sure they're the right size for your grinder! 4' (100mm) angle grinders, as the name suggests, accept grinding discs up to 100mm in size. These grinders are relatively small in size, and are suitable for smaller jobs. The size of disc that the grinder can accept dictates the depth of cut that the grinder can achieve. Complete various grinding applications and get fast material removal with the 9-in. 4HP Angle Grinder. Featuring a high-powered motor with overload protection, this grinder delivers 6,500 rpm for tough jobs. The GA9060 weighs only 5.5 Kg and is built with comfort and ergonomic features for extended use. The grinder features an ergonomic rubberised handle with trigger switch, and the gear housing can be positioned every 90 degrees for operator convenience.

They are completely different ; impact drivers provide torsional (rotational) impulses which act to drive the fastener clockwise as the screw advances into the material, percussion (hammer drill) provides linear impulses along the axis of the bit that act to micro-shatter the substrate (typically masonry) being drilled . A hammer drill works at a lower stroke rate, but with significantly greater impact energy than a percussion drill. This enables work to be completed more quickly. Hammer drilling in concrete requires less force than percussion drilling. An impact drill uses lateral percussion (from the side, in a circular motion). Once the drill senses that torque is needed , the drill uses impact to twist the screw into the surface. In short, an impact drill is used for driving screws and bolts that require a higher torque. Impact drivers produce lots of rotational force, capable of driving the largest wood screws in seconds. Internal mechanisms allow impact drivers to produce more torque than drills, and in quick bursts. These bursts or “impacts” happen up to 50 times a second, giving impact drivers their name. Can you use an impact driver to drill into concrete? If you drill holes that are less than 1/4 inch, an impact driver can help drill through concrete and brick. These tools have a massive amount of torque. However, they are not built to be used like hammer or regular drills. Percussion drilling is the perfect choice if you need to execute drilling in hard soils. Hard soil has layers of rubble or stones and percussion drilling can effectively drill through it. It is suitable for research on soil pollution, grain size distribution, general soil classification, and profile description. Percussion drilling is a drilling method in which a heavy hammering or cutting bit is attached to a cable and inserted into the borehole. The heavy bit or hammer is repeatedly lifted and dropped, thus boring through the earth. The hammer is made of hardened steel with carbide on the chisel -shaped bit.

They are completely different ; impact drivers provide torsional (rotational) impulses which act to drive the fastener clockwise as the screw advances into the material, percussion (hammer drill) provides linear impulses along the axis of the bit that act to micro-shatter the substrate (typically masonry) being drilled . A hammer drill works at a lower stroke rate, but with significantly greater impact energy than a percussion drill. This enables work to be completed more quickly. Hammer drilling in concrete requires less force than percussion drilling. An impact drill uses lateral percussion (from the side, in a circular motion). Once the drill senses that torque is needed , the drill uses impact to twist the screw into the surface. In short, an impact drill is used for driving screws and bolts that require a higher torque. Impact drivers produce lots of rotational force, capable of driving the largest wood screws in seconds. Internal mechanisms allow impact drivers to produce more torque than drills, and in quick bursts. These bursts or “impacts” happen up to 50 times a second, giving impact drivers their name. Can you use an impact driver to drill into concrete? If you drill holes that are less than 1/4 inch, an impact driver can help drill through concrete and brick. These tools have a massive amount of torque. However, they are not built to be used like hammer or regular drills. Percussion drilling is the perfect choice if you need to execute drilling in hard soils. Hard soil has layers of rubble or stones and percussion drilling can effectively drill through it. It is suitable for research on soil pollution, grain size distribution, general soil classification, and profile description. Percussion drilling is a drilling method in which a heavy hammering or cutting bit is attached to a cable and inserted into the borehole. The heavy bit or hammer is repeatedly lifted and dropped, thus boring through the earth. The hammer is made of hardened steel with carbide on the chisel -shaped bit.

4 Speed Magnetic Drilling Machine

4 Speed Magnetic Drilling Machine

4 Speed Magnetic Drilling Machine

They are completely different ; impact drivers provide torsional (rotational) impulses which act to drive the fastener clockwise as the screw advances into the material, percussion (hammer drill) provides linear impulses along the axis of the bit that act to micro-shatter the substrate (typically masonry) being drilled . A hammer drill works at a lower stroke rate, but with significantly greater impact energy than a percussion drill. This enables work to be completed more quickly. Hammer drilling in concrete requires less force than percussion drilling. An impact drill uses lateral percussion (from the side, in a circular motion). Once the drill senses that torque is needed , the drill uses impact to twist the screw into the surface. In short, an impact drill is used for driving screws and bolts that require a higher torque. Impact drivers produce lots of rotational force, capable of driving the largest wood screws in seconds. Internal mechanisms allow impact drivers to produce more torque than drills, and in quick bursts. These bursts or “impacts” happen up to 50 times a second, giving impact drivers their name. Can you use an impact driver to drill into concrete? If you drill holes that are less than 1/4 inch, an impact driver can help drill through concrete and brick. These tools have a massive amount of torque. However, they are not built to be used like hammer or regular drills. Percussion drilling is the perfect choice if you need to execute drilling in hard soils. Hard soil has layers of rubble or stones and percussion drilling can effectively drill through it. It is suitable for research on soil pollution, grain size distribution, general soil classification, and profile description. Percussion drilling is a drilling method in which a heavy hammering or cutting bit is attached to a cable and inserted into the borehole. The heavy bit or hammer is repeatedly lifted and dropped, thus boring through the earth. The hammer is made of hardened steel with carbide on the chisel -shaped bit.

They are completely different ; impact drivers provide torsional (rotational) impulses which act to drive the fastener clockwise as the screw advances into the material, percussion (hammer drill) provides linear impulses along the axis of the bit that act to micro-shatter the substrate (typically masonry) being drilled . A hammer drill works at a lower stroke rate, but with significantly greater impact energy than a percussion drill. This enables work to be completed more quickly. Hammer drilling in concrete requires less force than percussion drilling. An impact drill uses lateral percussion (from the side, in a circular motion). Once the drill senses that torque is needed , the drill uses impact to twist the screw into the surface. In short, an impact drill is used for driving screws and bolts that require a higher torque. Impact drivers produce lots of rotational force, capable of driving the largest wood screws in seconds. Internal mechanisms allow impact drivers to produce more torque than drills, and in quick bursts. These bursts or “impacts” happen up to 50 times a second, giving impact drivers their name. Can you use an impact driver to drill into concrete? If you drill holes that are less than 1/4 inch, an impact driver can help drill through concrete and brick. These tools have a massive amount of torque. However, they are not built to be used like hammer or regular drills. Percussion drilling is the perfect choice if you need to execute drilling in hard soils. Hard soil has layers of rubble or stones and percussion drilling can effectively drill through it. It is suitable for research on soil pollution, grain size distribution, general soil classification, and profile description. Percussion drilling is a drilling method in which a heavy hammering or cutting bit is attached to a cable and inserted into the borehole. The heavy bit or hammer is repeatedly lifted and dropped, thus boring through the earth. The hammer is made of hardened steel with carbide on the chisel -shaped bit.

Drill bit sizes are written as irreducible fractions . So, instead of 78/64 inch, or 1 14/64 inch, the size is noted as 1 7/32 inch. Below is a cart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths). (Decimal places for . If you know the size of the screw, you can locate the size of the drill bit by looking at the opposite end from the sharp point of the bit. It's likely engraved there. Standard metric sizes are defined in ISO 2936:2014 "Assembly tools for screws and nuts —Hexagon socket screw keys", also known as DIN 911. The full set of defined sizes are: 0.7 mm, 0.9 mm, 1.3 mm. 1.5 to 5 mm in 0.5 mm increments. They're great for being able to be quickly swapped out if you an adapter, and even without an adapter that hex shank is a lot easier for your drill chuck to grab onto when using very small bits like 1/16” & smaller. You'll see a list of numbers from to 10 or 20. These are used to set the clutch to deliver a torque range. The higher the number on the collar, the higher the torque and the larger the fastener that can be driven. To adjust your clutch, align the arrow to a lower setting and start driving a screw. Take a loose screw and compare it to the size of the bit you need to use, using the screw's core rather than its flute. A bit that is very slightly smaller than the screw will ensure a proper fit. Choosing a bit that is too small means that the screw will get stuck so take care to choose carefully. In hex, four digits of a binary number can be represented by a single hex digit. Dividing a binary number into 4-bit sets means that each set can have a possible value of between 0000 and 1111, allowing 16 number combinations from 0 to 15. With the base value as 16, the maximum value of a digit is 15.

Drill bit sizes are written as irreducible fractions . So, instead of 78/64 inch, or 1 14/64 inch, the size is noted as 1 7/32 inch. Below is a cart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths). (Decimal places for . If you know the size of the screw, you can locate the size of the drill bit by looking at the opposite end from the sharp point of the bit. It's likely engraved there. Standard metric sizes are defined in ISO 2936:2014 "Assembly tools for screws and nuts —Hexagon socket screw keys", also known as DIN 911. The full set of defined sizes are: 0.7 mm, 0.9 mm, 1.3 mm. 1.5 to 5 mm in 0.5 mm increments. They're great for being able to be quickly swapped out if you an adapter, and even without an adapter that hex shank is a lot easier for your drill chuck to grab onto when using very small bits like 1/16” & smaller. You'll see a list of numbers from to 10 or 20. These are used to set the clutch to deliver a torque range. The higher the number on the collar, the higher the torque and the larger the fastener that can be driven. To adjust your clutch, align the arrow to a lower setting and start driving a screw. Take a loose screw and compare it to the size of the bit you need to use, using the screw's core rather than its flute. A bit that is very slightly smaller than the screw will ensure a proper fit. Choosing a bit that is too small means that the screw will get stuck so take care to choose carefully. In hex, four digits of a binary number can be represented by a single hex digit. Dividing a binary number into 4-bit sets means that each set can have a possible value of between 0000 and 1111, allowing 16 number combinations from 0 to 15. With the base value as 16, the maximum value of a digit is 15.

Drill bit sizes are written as irreducible fractions . So, instead of 78/64 inch, or 1 14/64 inch, the size is noted as 1 7/32 inch. Below is a cart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths). (Decimal places for . If you know the size of the screw, you can locate the size of the drill bit by looking at the opposite end from the sharp point of the bit. It's likely engraved there. Standard metric sizes are defined in ISO 2936:2014 "Assembly tools for screws and nuts —Hexagon socket screw keys", also known as DIN 911. The full set of defined sizes are: 0.7 mm, 0.9 mm, 1.3 mm. 1.5 to 5 mm in 0.5 mm increments. They're great for being able to be quickly swapped out if you an adapter, and even without an adapter that hex shank is a lot easier for your drill chuck to grab onto when using very small bits like 1/16” & smaller. You'll see a list of numbers from to 10 or 20. These are used to set the clutch to deliver a torque range. The higher the number on the collar, the higher the torque and the larger the fastener that can be driven. To adjust your clutch, align the arrow to a lower setting and start driving a screw. Take a loose screw and compare it to the size of the bit you need to use, using the screw's core rather than its flute. A bit that is very slightly smaller than the screw will ensure a proper fit. Choosing a bit that is too small means that the screw will get stuck so take care to choose carefully. In hex, four digits of a binary number can be represented by a single hex digit. Dividing a binary number into 4-bit sets means that each set can have a possible value of between 0000 and 1111, allowing 16 number combinations from 0 to 15. With the base value as 16, the maximum value of a digit is 15.