Feature: -Quickly repairs damaged bolts and tightens the nuts in place. -Simplifies the repair process, eliminates the need to replace expensive or hard-to-find hardware. -This tool works by way of a shearing metal layer by layer. -Simple operation, 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. -High strength and hardness. -Safety conscientious design means no cut hands, no sparks, and no burns. -Convenient to use. -Durable in use. Specification: Material: CR12MOV Color: Silver Fits Size: 8-32 bolts (.164) up to 3/4?-10 (.750) - (4mm -19mm) Package included:1 x Deburring External Chamfer Tool