General description This set of wood plug drill bits includes 4 countersink drill bits and 4 claw drill bits, designed to meet various woodworking needs. Each shape features four sizes: 1/4", 3/8", 1/2", and 5/8" (6mm, 10mm, 13mm, and 16mm). Technical specifications Sizes: 6mm, 10mm, 13mm, 16mm Shank Diameter: Approx. 9.5mm Material: High-quality carbon steel Usage 4-tooth chamfer punches create tapered plugs to fill countersinks. Standard punches are used to remove wood defects. Recommended for use with bench drills for stability and improved efficiency. Use at moderate speeds to avoid smoke and burns.