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 specifications Material: High-speed steel (HSS) with titanium coating Dimensions 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 length Dimensions 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: 9.3mm Shape: 5 flutes Edge angle: 90 degrees Length of taper drill bits: 48mm Compatibility and accessories Compatible