This deburring external chamfer tool quickly Repairs damaged bolts and tightens the nuts in place, saving you time and money. The tool simplifies the repair process, can reduce repair time, and eliminates the need to replace expensive or hard-to-find hardware while maintaining safety at levels previously unattainable The operation is simple, using the lowest speed on the drill bit, and then slightly applying pressure to remove the burr. Effective on Stainless Steel, Hardened Steel, Mild Steel, Copper, Brass, Aluminum, Fiberglass, Wood, Plastic. Fits Size: 8-32 bolts (.164) up to 3/4’’-10 (.750) - (4mm -19mm), Simple design and a compact size, means the tool is easily carried in your tool pouch. Quickly slap it into your hand drill and start repairing work pieces. Product Description Features 1. Quickly repairs damaged bolts and tightens the nuts in place. 2. Simplifies the repair process, eliminates the need to replace expensive or hard-to-find hardware. 3. Simple operation, using the