Simplifies the repair process! FEATURES: ✔️SUPER DURABLE HARD STEEL - Made of extremely hard stainless steel with high strength and hardness for durability, anti-rust, and anti-corrosion. It can accompany you for a long time. ✔️SAFE AND EFFICIENT - The high strength and hardness deburring external chamfer tool easily shaves down the outer edges of a bolt, pipe, or rod, and removes the burr. Quickly repairs damaged bolts and tightens the nuts in place without hurting your hand, with no sparks, and no burns; Simplifies the repair process. ✔️SIMPLE OPERATION - Attach the deburring external chamfer tool to the end of your power drill, Use the lowest speed on the drill bit, and then slightly apply pressure to remove the burr. The tool simplifies the repair process, can reduce repair time, and eliminates the need to replace expensive or hard-to-find hardware. Great helper for industry and household. ✔️WIDELY APPLICATION - The chamfer tool is effective on stainless steel, hardened steel, mild steel, copper, brass, aluminum, fiberglass, wood, and plastic no matter it with or without screw thread. Fits size(approx.):5/16-32 bolts (.164) up to 3/4″-10 (.750) - (8mm -19mm)