Effortless Countersinking: This chamfer drill bit combines drilling and countersinking in quick operation, for wood screws in woodworking projects without needing to change bits, saving valuable time and effort. Precise Depth Adjustment: Simply loosen or tighten the fixing screw to easily adjust the countersink depth for screws of various lengths, guaranteeing a flush and professional finish every time. QuickChange Hex Shank: Features a 1/4 inch hex shank that is compatible with most quickchange chucks, allowing for fast bit swaps and continuous workflow. Long Lasting Construction: Crafted with a YG8 alloy blade head and 45# carbon steel body with a spray finish, this wood hole drill bit offers lasting performance and resistance to wear. Use scenarios Cabinets and furniture assembly requiring flush countersinking for clean screw heads. Hinge mounting or hardware installation with screws of varying lengths. Repetitive countersinking tasks in plywood or solid wood projects that benefit from quick bit changes.