Taper Cutter Wood Deburring Tool Hex Shank Drill Bits 1/4" Metal Chamfer Woodworking Drill Bit 5/64" 1/8" 3/16", 3 Pack Quick change 1/4" standard hex shank; Shank Type: Hex Shank Excellent for sinking 90 degree holes in wood and soft metal countersunk screws and fasteners. Suitable for DIY, home and general construction/engineering use. Bearing steel chamfer countersink, performed well in chamfering, deburring, bore-hole. Professional chamfering cutter, smooth sharp edge, cutting effect is good. Ideal for chamfering of thin process, such as wood, PVC board, aluminum sheet, insulation board or thin plastic sheet , etc. Specification: Material: 4241 high speed steel Size: (3 types) < p>5/6415/64 (1.98mm-5.95mm) 1/811/32 (3.175mm-8.73mm) 3/1617/ 32 (4.76mm-13.5mm) 5/64-15/64 Length: 46.8mm (1.85") 1/8-11/32 Length: Save mm (5cm) 3/16-17/32 Length: 58.9mm (2.3") Features: - Ideal for cutting through metal, wood and plastic quickly and easily - Smooth and durable surface Note: Size - for manual measurement, there may be 0-3mm error, belongs to the normal phenomenon .