This Countersink Drill Bit Set includes 7 pieces: 2.8mmx8mm, 3.2mmx8mm, two 3.5mmx10mm, two 4.0mmx10mm tapered pilot drills, plus an L-type hex wrench. The matched sizes cover common screw diameters for clean pilot holes, countersinks, and counterbores. Versatile Countersink Drill Bit Set for natural and engineered wood, MDF, particle board, plywood, plus aluminum and other non-ferrous metals and decorative panels. Ideal for woodworking, home improvement, and pro carpentry across many projects. Dial in drilling and countersinking depth on the Countersink Drill Bit Set using the hex screws and depth-control stops; swap or set pilots quickly with the included wrench. Precise, repeatable results for cabinetry, furniture, decking, and trim work. Made with M2 HSS pilot drills and -carbide alloy cutting edges, this Countersink Drill Bit Set uses a helical chip design to clear debris fast and cut smoothly. It's tuned for 82° imperial screws, delivering chatter-free countersinks. For crisp edges, run the Countersink Drill Bit Set at slow speed around 200 RPM and let the bit do the work; avoid excessive force. If you ever run into any issues, just reach out-our team is ready to provide troubleshooting help, replacements, or other solutions to make sure you're completely satisfied., Manufacturer: Akfldms