Quickly repairs damaged bolts and tightens nuts in place, simplifying the process and eliminating the need to expensive or hardtofind hardware. Simple operation and time savings: use the lowest speed on the drill, then gently apply pressure to remove burrs; convenient to use and can save more than 80% of time. Safe, layerbylayer metal removal: this tool bit works by shearing metal layer by layer; safetyconscious design means no cut hands, no sparks, and no burns. Wide material compatibility: effective on stainless steel, hardened steel, mild steel, copper, brass, aluminum, fiberglass, wood, and plastic. Practical use scenarios: Automotive or machinery maintenance: salvage damaged bolts and secure fasteners in engines, frames, or housings without replacing hardware. Home repairs and DIY projects: fix damaged bolts in appliances, bicycles, or furniture; clean burrs after drilling to restore fit. Fabrication and installation: prepare joints in metal, plastic, or wood during assembly to ensure burr threads and smooth surfaces.