General description The 5pcs 8mm Countersink Drill Bits set is designed for woodworking and plastic drilling, featuring five different sizes to accommodate various projects. Made from high-quality alloy steel, these drill bits offer superior precision, hardness, and cutting speed compared to standard drill bits. Technical specifications Sizes: 2.8 x 8 mm, 3.0 x 8 mm, 3.2 x 8 mm, 3.5 x 8 mm, 4 x 8 mm Material: High-quality alloy steel Usage Ideal for home or professional woodworking projects Suitable for soft materials such as wood panels, aluminum panels, plywood, plastic, and PVC panels Not recommended for metals or steel plates Other information Fast chip removal with HSS spiral flute design Adjustable countersink length for different screw lengths using the provided hex wrench