Made from high-speed steel, the pocket hole drill bit is designed for and durability. These twist drill bits are rust-proof, wear-, and can handle high impact and heat, making them perfect for any pocket hole jig kit. The pocket hole bit features a small tip with a hole for the screw shank and a large diameter that creates a flat-bottomed hole. This ensures clean and precise drilling, making your woodworking tasks more efficient and effortless. The hex and round shank drill bit design allows for a wide range of applications, including drilling into wood, aluminum, thin metal, and other materials. Ideal for use with a pocket hole jig kit or as standalone tools for projects. The pocket hole drill bit is designed for ease of use. The 1/4 inch hex shank works with any chuck, and the drill bits are compatible with both corded and cordless high-rpm drills. Perfect for DIY enthusiasts and professional woodworkers alike. This pocket hole drill bit kit includes 4 twist drill bits (2 round shank and 2 hex shank), 4 stop collars, and 4 wrenches. The comprehensive set meets all your drilling, punching, and replacement needs, providing convenience and versatility for your daily work. Product name: 4-piece pocket hole bit set Style: simple, practical Product use: widely used for drilling and positioning, suitable for wood, aluminum, thin metal and other materials Single product size:Drill bit size:17cm/6.69inch Colour:Silver Material:Metal Package Contents: 1set * pocket hole drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.