General description The Countersink Drill Bit Set includes 8 pieces of high-speed steel (HSS) drill bits designed for woodworking and metalworking. The set features a variety of sizes to accommodate different drilling needs. Technical specifications Material: HSS 4241 Flute design: 5 flutes Sizes included: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm Compatibility and accessories Includes a small wrench for adjusting drilling depth Usage Suitable for drilling into wood (hardness less than 25 degrees), steel, aluminum, and plastic Ideal for production, maintenance, or portable drilling work