Made of extremely hard alloy steel with high strength and hardness, durable, rust-proof, and anti-corrosion; designed to last Size: Fits 1/8 in. (3 mm) to 1 in. (25 mm); operates with full lubrication and 400 RPM EASY TO USE: This deburring exterior chamfering tool allows for easy removal of burrs on the outer edges of flat bolts. Simply attach it to a drill and lightly press on the bolt head to quickly secure the nut Safe and efficient: High-strength, high-hardness deburring drill bit easily cuts the outer edges of bolts, pipes, and rods, removes burrs, and repairs damaged bolts. Tightens nuts securely without causing hand injuries, sparks, or burns Wide range of applications: Effectively machines stainless steel, hardened steel, mild steel, copper, brass, aluminum, fiberglass, wood, and plastic, with or without threads Color: Black + Blue Material: High speed steel Package Contents: 2 x Chamfer Tool Note: Light reflection and different displays may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm