26-piece countersink drill bit set, 8 pieces wood dowel cutter drill bits, 7 pieces three-point drill bits, 6 pieces countersink drill bits, 3 pieces step cone drill bits

General description This 26-piece countersink drill bit set includes a variety of drill bits designed for woodworking and metalworking. It features 8 wood dowel cutter drill bits, 7 three-point drill bits, 6 countersink drill bits, and 3 step cone drill bits, all made from high-quality materials for durability and performance.Technical specificationsMaterial: High-speed steel (HSS) with titanium coatingDimensions of countersink drill bits: 3mm diameter x 60mm length, 4mm diameter x 75mm length, 5mm diameter x 85mm length, 6mm diameter x 93mm length, 7mm diameter x 10mm length, 8mm diameter x 11mm length, 10mm diameter x 12mm lengthDimensions of step drill bits: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm), 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm), 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)Shank diameter: 9.3mmShape: 5 flutesEdge angle: 90 degreesLength of taper drill bits: 48mmCompatibility and accessoriesCompatible with bench drills, hand drills, and other professional drilling machinesIncludes 1 automatic punch for marking workpiecesInstallationFor optimal performance, it is recommended to use a bench drill or clamp the drill bit to prevent slipping or eccentricity during drillingUsageSuitable for drilling wood, stainless steel, carbon steel, aluminum plate, iron plate, and other materialsAdjustable drilling length for different screw lengthsOther informationFor safety, do not operate the device too fast when using itPlease check compatibility with your machine before use