General description This 3Pcs External Chamfering Tool set is designed for efficient deburring and countersink removal from various drill bits. Made from high-quality hard alloy, these tools offer high strength, hardness, and a long service life. Their unique design ensures safety by protecting your hands, preventing sparks or burns, and avoiding damage to the tools. Technical specifications Material: High-quality hard alloy Functionality: Repairs damaged bolts and tightens nuts Applications: Suitable for stainless steel, hardened steel, mild steel, copper, brass, aluminum, fiberglass, wood, and plastic Usage Use at the lowest drilling speed Apply pressure to effectively remove burrs