Upgraded material : Our sliver Deburring External Chamfer Tool is made of HSS, strong, Sturdy and durable, Shock proof, not easy to deform. 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 Very easy for use : the operation is simple, It only takes 1-2 minutes to complete the operation, using the lowest speed on the drill bit, and then slightly applying pressure to remove the burr. Wide range of use: 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 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.