Features: The Koolenry Multifunctional Countersink Drill Bit features adjustable depth stop and double sided 8mm/10mm design, crafted from high speed steel for 50% enhanced wear resistance in woodworking and metal projects. Its innovative convertible design allows quick transformation into a 45° chamfer cutter, providing precisions drilling and countersinking in compact tool with a nonslip ergonomic handle. Ideal for professional carpenters and enthusiasts, this versatile drill bit set in furniture assembly, model crafting, and soft metal applications requiring consistent hole depth control. Perfect for woodworking shops, home renovations, and on site repairs, the tool’s lightweight 300g construction and portable case ensures organized storage and easy transport between job site. The double stage countersink systems eliminates tool switching hassles, delivering clean 3 12mm holes across materials like hardwood and plywood with reinforced alloy steel durability. Specifications: Component: Alloy Properties: 2.8x8-2.8x10/3.0x8-3.0x10/3.2x8-3.2x10/3.5x8-3.5x10/4.0x8-4.0x10 Package Includes: 1Set Countersink Drill Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.