Feature: 1. OUTSTANDING CUTTING PERFORMANCE: Made from hard alloy steel with a hardness of HRC 50 to 54, the countersink drill bit delivers exceptional cutting ability for clean holes every time. 2. LONG DURABILITY: With superior durability and wear resistance, this adjustable countersink bit can withstand heavy use and last for years to come. 3. ADJUSTABLE DEPTH: Easily adjust the depth for various screw lengths and create perfectly countersunk holes in wood, while protecting the surface and preventing debris clogging. 4. PERFECT FOR WOODWORKING: The drill bit is ideal for making countersunk holes without splitting or damaging the wood surface, for a professional and precise finish. 5. WIDE COMPATIBILITY: Suitable for wood, MDF, particleboard and dense plywood, not recommended for cutting black metal, steel, iron, sand, or other hard materials. Specification: Item Type: Countersink Drill Bit Material: Alloy Steel Basic Parameters: Specification: 8 x 10 x 3.2. Package List: 1 x Countersink Drill Bit1 x Hex Wrench1 x Wrench1 x Screw1 x Storage Case