Features: This 3 in 1 woodworking countersink drill bit combines countersinking, slotting, and drilling functions in compact tool, saving workspaces while efficiently switching between tasks. Features a durability double cutter head design with high carbon steel construction for powerful cutting performances, reduced wood chip jams, and long lasting sharpness through repeated use. Ideal for woodworking enthusiasts, DIYers, and professional carpenters requiring precise hole preparation for furniture assembly or cabinetry projects. Perfect for creating clean, burr less countersinks in softwoods, hardwoods, and composite materials during workshop projects or home renovations. The precise engineered aluminum alloy body ensures stable operations and perfectly aligned holes, delivering professional result with smooth edged for seamless hardware installation. Specifications: Component:Aluminum alloy Size:Approx.2.8mm/3mm/3.2mm/3.5mm Package Includes: 1 Set Countersink Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.