Feature:1. Quickly Repair: Quickly repair damaged bolts and tighten nuts in place, simplifying the repair process.2. Metal Cutting Method: The triangular handle chamfering device works with metal cutting layer by layer.3. Simple Operation: Use the lowest speed on the drill bit, and then slightly apply pressure to remove the burr.4. Chamfer Tool: Eliminating the need to replace expensive or hard to find hardware. Great helper for industry and household.5. Wide Use: The chamfer tool is effective on stainless steel, hardened steel, mild steel, copper, brass, aluminum, fiberglass, wood, plastic.Specification:Item Type: Deburring Chamfering DeviceMaterial: MetalLargest Inner Diameter Opening: Approx. 21mm / 0.8inWeight: Approx. 138g / 4.86ozPurpose: Chamfering Device.Package List:2 x Deburring Chamfering Device