General description Quality Materials: Made from high-quality alloy blades that are waterproof and anti-corrosion, these hardened HSS steel blades are sharper and more durable, ensuring long-lasting performance. Technical specifications Drill Bit Size: 8mm Material: High-speed steel (HSS) Type: Countersink drill bits Usage Suitable for punching holes in wood, including solid wood, particle board, plywood, and MDF. Features a depth stop for precise drilling. Quickly discharges chips from the hole to improve drilling efficiency. Other information Includes a hex key for adjusting the length of the countersunk hole to accommodate screws of different lengths. Adjustable limits of the round shank provide a stable clamping effect and easy operation.