Countersink Chamfer Drill Bit Set Tool Deburring Tool Set.Quick-change 1/4" standard hexagon shank; Type of shank: hex shankGreat for Sinking 90 Degree Holes into Wood and Soft Metals Countersunk Screws and Fixings. Suitable for DIY, Home, and General Building/Engineering Using.Bearing steel chamfer cutter countersink set, performed well in chamfering, deburring, and bore-hole. Professional chamfering cutter, smooth sharp edge, cutting effect is good.Suitable for chamfering process the thin board, such as wood, PVC board, aluminum sheet, insulating plate or thin plastic sheet, etc.Specification:Material: High-speed steel 4241Size: (3 types)5/64-15/64(1.98mm-5.95mm)1/8-11/32(3.175mm-8.73mm)3/16-17/32(4.76mm-13.5mm)Features:It-Ideal for cutting through metal, wood, and plastic quickly and easily-Smooth surface& durableNote:-Size for manual measurement, there may be a 0 to 3 mm error, belongs to the normal phenomenon.-The item is sharp enough, please get away from the children.-Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!!Package included:3 x Countersink and Deburring Tool