Material and durability The deburring tool is made of speed steel, offering strength and hardness, antirust and anticorrosion performance for long service life. It features three alloy cutter blades with strong cutting and repairing capabilities, enabling burrs to be removed more cleanly and efficiently. Function and design This external deburring and chamfering tool is designed to damaged bolts and fasteners. It easily polishes the rough edges of bolts and pipe ends. Using lubricant greatly improves its efficiency, resulting in smoother and more complete bolts. Compatibility and operation Fits external burrs from 1/8' (3 mm) to 3/4' (20 mm). Operate with sufficient lubrication and at speeds under 500 RPM. Hex shank with quick release design fits most drills. Can be used to damaged or flattened bolts of virtually any material. Chamfer and burr removal Easily shaves down the outer edges of screws, bolts, pipes, and rods and removes burrs. Quickly repairs damaged bolts and tightens nuts in place without hurting your hand. No sparks, and no burns. Simplifies the process. Use scenarios Automotive or machinery maintenance: restore damaged bolts or studs in engines or equipment, removing burrs before reassembly. Plumbing and metal fittings: deburr and chamfer pipe ends for threaded joints and fittings. General workshop or DIY projects: refurbish damaged fasteners in metal furniture, equipment, or other projects to improve fit and reliability.