Description Overall high frequency quenching, the hardness and oxidation resistance, enhances its wear resistance, high temperature resistance, cutting property. High hardness, smooth chip processing, can once fulfill the chamfering, deburring, and cone processing. It is a professional chamfering tool for batch processing, used for chamfering round holes and edges. Features - Color: Black - Material: High speeds steel - Size:5.00X2.00X2.00cm/1.97X0.79X0.79inch. - Made of high-speed steel material, high hardness, rustproof, solid and durable - The chamfering with a groove, easier to discharge debris and the High Steel Drill Bit not easy to blunt - High hardness, smooth chip processing, can fulfill the chamfering, deburring, and cone processing. Used for workpiece circular aperture chamfering or cone hole - It is suitable for holing chamfering the boards with low hardness, such as wooden boards and plastic boards. Do not use this product to chamfering the metal. - Idea for cutting through plastic, aluminum, copper, stainless steel, aluminum plate, insulation boards, and PVC sheet, etc.Package list: 3 x deburring bits