Specifications Product Name 6 Piece Adjustable Woodworking Countersink Drill Bit SetMaterial Premium 45 Carbon Steel body with Alloy Steel drill tipsShank Type Standard round hex compatibilityCompatible Devices Hand Drills Lithium ion Cordless Drills and Bench PressesApplicable Materials Solid wood pine beech MDF plywood and compressed boardFeatures 1 Efficient Two in One Operation Simultaneously drills pilot holes and countersinks for screws ensuring a flush or recessed finish This streamlined process eliminates tool swapping and increases your workflow productivity significantly 2 Premium Alloy Construction Engineered with high strength 45 steel and alloy tips these bits offer exceptional hardness and heat resistance for clean precise cuts without burning the workpiece 3 Adjustable Drilling Depth The center drill length can be easily adjusted using the included wrench allowing you to customize the depth for various screw lengths and material thicknesses 4 Universal Tool Compatibility Designed for versatility these bits perform flawlessly with hand held electric drills cordless lithium drills and stationary bench drills across various woodworking projects 5 Professional Finish Quality Optimized for a wide range of timbers including pine beech and composite boards delivering smooth holes for both hidden and surface flush screw installations Package Included 2 x Countersink Drill Bits3 x Screwdriver Bits1 x Adjustment Wrench