When it comes to electric impact drills, the versatility of these powerful tools is significantly enhanced by the wide array of accessories available in the market. These accessories cater to various drilling and fastening needs, making electric impact drills indispensable in construction, woodworking, metalworking, and DIY projects. This comprehensive guide will explore the different types of electric impact drill accessories, their features, applications, and some popular brands and models.
Drill bits are perhaps the most commonly used accessories for electric impact drills. They are designed to create holes in different materials, including wood, metal, plastic, and masonry.
Twist Drill Bits: Twist drill bits are the most basic and widely used type. They have a helical flute design that helps to remove debris from the hole as it is being drilled. These bits are typically made from high – speed steel (HSS) or high – carbon steel. HSS bits offer better heat resistance and durability, making them suitable for drilling into harder materials like metal. For example, the Bosch Daredevil HSS Twist Drill Bit Set is highly regarded. It comes with a variety of sizes, from small diameters for delicate work to larger ones for more substantial projects. The bits feature a 135 – degree split point, which reduces walking on the material surface and allows for faster and cleaner starts.
Masonry Drill Bits: As the name suggests, masonry drill bits are specifically designed for drilling into hard materials such as concrete, brick, and stone. They usually have a carbide tip, which is extremely hard and resistant to wear. The SDS (Slotted Drive System) is a common type of connection for masonry drill bits. For instance, the DeWalt SDS – Plus Masonry Drill Bit Set is a popular choice. It includes bits of different lengths and diameters, and the carbide tips are designed to maintain sharpness even after prolonged use. The bits also feature a special flute design that efficiently clears away dust and debris, improving drilling speed and bit life.
Spade Bits: Spade bits are mainly used for drilling large holes in wood. They have a flat, paddle – like shape with a sharp point at the center to start the hole and cutting edges on the sides. Irwin Tools Marples Spade Bits are well – known in the market. They come in a wide range of sizes, from small 1/4 – inch bits for minor holes to large 2 – inch bits for more extensive applications. The aggressive cutting edges and wide flutes of these spade bits allow for quick and efficient hole – making in wood, making them a favorite among carpenters and woodworkers.
Forstner Bits: Forstner bits are used to create flat – bottomed holes in wood. They are ideal for applications where a clean, precise hole with a flat surface is required, such as for making dowel joints or installing hardware. Freud Forstner Bits are highly regarded for their quality. These bits have a unique cutting design that reduces tear – out and produces smooth, accurate holes. They are available in various diameters and are often used in woodworking projects where precision is key.
Driver bits are used for driving screws and bolts. They come in different tip shapes to match the corresponding screw head types.
Phillips Driver Bits: Phillips driver bits are one of the most common types. They have a cross – shaped tip that fits into Phillips – head screws. The Milwaukee Shockwave Impact Duty Phillips Driver Bits are a top – of – the – line option. These bits are designed to withstand the high torque of impact drills. They feature a precision – machined tip that provides a secure fit in the screw head, reducing cam – out (when the bit slips out of the screw head) and ensuring efficient driving.
Flat – Head Driver Bits: Flat – head driver bits have a flat, blade – like tip that is used with flat – head screws. The Stanley FatMax Flat – Head Driver Bits are known for their durability. They are made from high – quality steel and have a magnetic tip, which helps to hold the screw in place during driving, making the process more convenient, especially in hard – to – reach areas.
Torx Driver Bits: Torx driver bits have a six – pointed star – shaped tip. They offer better torque transfer and are less likely to cam – out compared to Phillips and flat – head bits. The DeWalt Torx Impact Duty Driver Bits are popular among professionals. They are designed for use with impact drivers and drills, and their unique design ensures a tight fit in Torx – head screws, making them suitable for heavy – duty applications where high torque is required.
Hex Driver Bits: Hex driver bits, also known as Allen bits, are used with hex – head screws and bolts. The Bosch Hex Impact Driver Bits are well – known for their strength and precision. These bits are available in different sizes and are made from premium materials to withstand the rigors of impact drilling. They are commonly used in automotive repair, furniture assembly, and other applications where hex – head fasteners are prevalent.
Hole saws are used to cut large – diameter holes in materials such as wood, metal, and plastic. They consist of a circular saw blade with a pilot drill bit in the center.
Bi – Metal Hole Saws: Bi – metal hole saws are made from two different types of metals, usually high – speed steel for the teeth and spring steel for the body. This combination provides a good balance of durability and cutting performance. The Lenox Bi – Metal Hole Saws are highly rated. They feature sharp, aggressive teeth that cut through materials quickly, and the bi – metal construction ensures a long service life. These hole saws are available in a wide range of diameters, from small 1 – inch sizes to large 6 – inch sizes, making them suitable for various applications.

Diamond – Tipped Hole Saws: Diamond – tipped hole saws are designed for cutting through hard materials such as tile, marble, and granite. The diamond – coated teeth are extremely hard and can efficiently cut through these tough surfaces. The MK Morse Diamond – Tipped Hole Saws are popular in the construction and remodeling industries. They are available in different sizes and are capable of creating clean, precise holes in stone and ceramic materials.
Countersink bits are used to create a conical hole that allows a screw head to sit flush or below the surface of the material. This is important for a clean and professional finish, especially in woodworking and furniture making.
Single – Flute Countersink Bits: Single – flute countersink bits have a single cutting edge. They are simple in design and are suitable for basic countersinking tasks. The Irwin Tools Countersink Bits are a reliable option. They are made from high – quality steel and have a sharp cutting edge that can quickly create a countersink in wood or soft metals.
Multi – Flute Countersink Bits: Multi – flute countersink bits, on the other hand, have multiple cutting edges, which allows for faster and smoother countersinking. The Freud Multi – Flute Countersink Bits are known for their high performance. These bits can create a clean, accurate countersink with minimal effort, and they are available in different angles and sizes to meet various project requirements.
Impact socket sets are used in conjunction with electric impact drills for driving and removing nuts and bolts. They are designed to withstand the high torque generated by impact drills.
Craftsman Impact Socket Sets: Craftsman offers a wide range of impact socket sets. These sets typically include sockets of different sizes, both standard and metric. The sockets are made from high – quality chrome – vanadium steel, which provides excellent strength and durability. The set also features a black oxide finish, which helps to prevent rust and corrosion, ensuring a long service life.
Snap – On Impact Socket Sets: Snap – On is a well – known brand among professionals. Their impact socket sets are of the highest quality. The sockets are precision – manufactured to ensure a perfect fit on nuts and bolts, reducing the risk of rounding off the fastener. They are made from premium materials and are designed to withstand the extreme forces generated by heavy – duty impact drills. The sets often come with a durable storage case for easy organization and transportation.
Auger bits are used for drilling deep holes in wood. They have a long, slender shank and a large, flat cutting head with a screw – like tip that pulls the bit into the wood as it rotates.
Irwin Tools Auger Bits: Irwin Tools offers a variety of auger bits. These bits are designed for efficient wood boring. The screw – tip design allows for fast penetration, and the wide flutes quickly remove wood chips from the hole. They are available in different lengths and diameters, making them suitable for various woodworking projects, from building furniture to constructing wooden structures.
In conclusion, the market offers a vast selection of electric impact drill accessories, each with its own unique features and applications. Whether you are a professional contractor or a DIY enthusiast, understanding the different types of accessories and choosing the right ones for your specific tasks can greatly enhance the performance and versatility of your electric impact drill. Popular brands like Bosch, DeWalt, Milwaukee, and others continue to innovate and produce high – quality accessories that meet the diverse needs of users across different industries and applications.
Step drill bits, also known as unibit or multi – step drill bits, are designed to create holes of multiple diameters in a single pass. They have a conical shape with stepped diameters, eliminating the need to switch between different drill bits for various hole sizes. This makes them extremely convenient for tasks such as drilling holes in sheet metal, plastic, and thin wood.
Greenlee Step Drill Bits: Greenlee is a reputable brand in the field of step drill bits. Their step drill bits are made from high – speed steel, which offers excellent durability and cutting performance. The bits are precisely engineered to ensure smooth and accurate hole – making. For example, the Greenlee 725 – 13 Step Drill Bit has a range of diameters from 1/8 inch to 1 – 1/8 inches, making it suitable for a wide variety of applications in electrical, plumbing, and general metalworking projects. The unique flute design helps to clear debris effectively, reducing the risk of clogging and ensuring a clean cut.
DEWALT Step Drill Bits: DEWALT’s step drill bits are also highly regarded. These bits feature a split – point tip that reduces walking on the material surface, allowing for a more precise start. The DEWALT DW1361 Step Drill Bit, for instance, is designed for use with impact drills and can quickly and easily drill holes in materials like stainless steel, aluminum, and plastic. The bit’s durable construction ensures it can withstand the rigors of repeated use in tough applications.
There are hole cutters designed specifically for certain materials to achieve the best results.
Plastic Hole Cutters: For cutting holes in plastic materials, specialized plastic hole cutters are available. The Excel Blades Plastic Hole Cutter Set is designed to cut clean, precise holes in various types of plastics, including PVC, acrylic, and ABS. These hole cutters have sharp, serrated edges that grip the plastic and cut through it smoothly without causing excessive melting or cracking. They are available in different sizes, making them suitable for applications such as installing pipes, creating holes for electrical outlets in plastic enclosures, and more.
Composite Material Hole Cutters: With the increasing use of composite materials in construction and manufacturing, there are hole cutters designed to handle these unique materials. Brands like Diablo offer hole cutters for composite materials. Their hole cutters feature a diamond – grit edge that can effectively cut through materials such as fiber – cement siding, which is a popular composite material in modern construction. The diamond – grit edge ensures a clean cut, minimizing the risk of chipping and damage to the composite material.
Flush – cutting bits are used to trim materials flush with a surface. They are commonly used in woodworking, especially when working with edge banding or when trimming plywood to fit precisely.
Bosch Flush – Cutting Bits: Bosch offers a range of flush – cutting bits that are highly efficient. These bits have a unique cutting design with carbide teeth that can quickly and cleanly trim materials. For example, the Bosch 82040M Flush – Trim Bit is designed for use with routers and can also be used with some electric impact drills with appropriate adapters. The bit’s up – spiral design helps to clear chips away from the cutting area, resulting in a smooth and clean finish. It is suitable for trimming materials such as laminate, veneer, and solid wood edge banding.
Freud Flush – Cutting Bits: Freud’s flush – cutting bits are also known for their quality. The Freud 99 – 205 Flush Trim Router Bit has a double – bearing design that ensures a precise cut along the edge of the material. The carbide tips are sharp and durable, allowing for a long service life. These bits are ideal for achieving a professional – looking finish in woodworking projects where a flush cut is required.
Magnetic bit holders are essential accessories that make working with driver bits more convenient. They attach to the electric impact drill and hold the driver bit in place using a magnet. This not only keeps the bit securely attached during operation but also helps to pick up and hold screws, reducing the need for manual handling in tight or hard – to – reach spaces.
Milwaukee Magnetic Bit Holders: Milwaukee’s magnetic bit holders are among the best in the market. The Milwaukee 48 – 32 – 4401 Magnetic Bit Holder features a strong neodymium magnet that can hold even larger and heavier screws firmly. The holder has a quick – change feature that allows for easy bit replacement, increasing productivity. It is also designed to be durable, with a robust construction that can withstand the rigors of daily use on construction sites or in workshops.
Makita Magnetic Bit Holders: Makita offers magnetic bit holders that are highly reliable. The Makita B – 62838 Magnetic Bit Holder has a unique design that provides a secure grip on the bit and the screw. The holder is compatible with a wide range of Makita electric impact drills and other power tools. Its compact size makes it easy to maneuver in tight spaces, and the strong magnetic force ensures that the screw stays in place during driving, preventing it from falling off and getting lost.
Angle attachments for electric impact drills allow the user to change the direction of the drill bit, making it possible to work in tight spaces or at awkward angles.
DEWALT Angle Attachment: The DEWALT DWARA12 Right Angle Attachment is a popular choice. It can be easily attached to most DEWALT electric impact drills. This attachment has a 1/4 – inch hex chuck that can hold a variety of drill bits and driver bits. It features a ball – bearing construction that ensures smooth operation and reduces friction, allowing for efficient drilling and driving at right angles. It is extremely useful for tasks such as installing cabinet hardware in tight corners, working behind radiators, or in other confined spaces where a standard drill would be difficult to use.
Bosch Angle Attachment: Bosch’s angle attachment, such as the Bosch GOP 10 – 82 Angle Grinder Attachment, offers similar functionality. It is designed to provide versatility in different working conditions. The attachment is made from high – quality materials that can withstand the vibrations and forces generated by the impact drill. It has an adjustable speed control feature, which allows the user to match the speed of the drill to the specific task at hand, whether it’s delicate drilling or heavy – duty driving.
Flexible shafts are accessories that can be attached to an electric impact drill to extend its reach and provide more flexibility in accessing hard – to – reach areas.
Dremel Flexible Shaft: Although Dremel is well – known for its rotary tools, their flexible shafts can also be used with some electric impact drills with appropriate adapters. The Dremel 225 – 01 Flexible Shaft Attachment allows for precise and detailed work in tight spaces. It has a lightweight and flexible design that can bend and twist to reach areas that are otherwise inaccessible. The shaft has a collet at the end that can hold a variety of small – diameter drill bits, sanding drums, and other accessories, making it suitable for tasks such as engraving, polishing, and small – hole drilling in confined spaces.
Ryobi Flexible Shaft: Ryobi offers a flexible shaft that is designed for use with their range of power tools, including some electric impact drills. The Ryobi P630 Flexible Shaft has a durable construction and a comfortable grip. It can transmit the power of the drill effectively to the attached accessory, allowing for smooth operation. This flexible shaft is useful for tasks such as working inside electrical boxes, plumbing installations in tight spaces, and other applications where access is limited.
In summary, the world of electric impact drill accessories is constantly evolving, with new and innovative products being introduced regularly. By exploring and utilizing these various accessories, users can unlock the full potential of their electric impact drills, making their projects more efficient, precise, and professional – looking. Whether you are working on a large – scale construction project, a detailed woodworking job, or a simple DIY home improvement task, there is an electric impact drill accessory out there to meet your specific needs. As technology advances, we can expect even more specialized and high – performing accessories to enter the market, further enhancing the capabilities of this essential power tool.