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. Item Type: Countersink Drill Bit Material: Alloy Steel Basic Parameters: Specification: 8 x 10 x 3.2 1 x Countersink Drill Bit 1 x Hex Wrench 1 x Wrench 1 x Screw 1 x Storage Case