Effortless Wood Screw Countersinking This chamfer drill bit combines drilling and countersinking in one step, making it ideal for woodworking projects that use wood and aluminum alloy screws. It eliminates the need for multiple bit changes, saving time and reducing tool switching during assembly. QuickChange Hexagon Shank Design Standard 1/4 inch hex shank provides secure grip in all chuck types. Enables quick bit replacement with any standard wrench, helping to maintain workflow efficiency and minimize downtime. Adjustable Countersink Depth Control Loosen or tighten the fixing screw to precisely control the drilling depth for various screw lengths. This ensures consistent and professional looking countersunk results every time. Long Lasting Construction YG8 alloy blade head and 45# carbon steel body with a spray finish deliver strong wear resistance for extended service life. Built to withstand repeated use in woodworking applications. Use scenarios Cabinet and furniture assembly: drill and countersink wood screws in a single pass for a clean, flush finish across panels and frames. Hardwood or softwood projects: set the countersink depth to match screw length, achieving uniform countersunk heads on shelves, frames, and decorative pieces. Metalwood joinery with aluminum alloy screws: reliably countersink and drill in one step, reducing tool changes during multimedia or hardware installations. Specifications at a glance Shank: standard 1/4 inch hex Material: YG8 alloy blade head, 45# carbon steel body Finish: spray finish Function: combined drilling and countersinking for wood and aluminum alloy screws Depth control: adjustable via fixing screw for various screw lengths This tool provides reliable performance with straightforward operation, making it suitable for DIY enthusiasts and professional woodworkers seeking efficient, consistent countersinking results.