The operation of Deburring Tools is simple, using the lowest speed on the drill bit, and then slightly applying pressure to remove the burr This Deburring External Chamfer Tools works by a way of shearing metal layer by layer Deburring External Tools Effective on Stainless Steel, Hardened Steel, Mild Steel, Copper, Brass, Aluminum Chamfer Tools made of high speed steel with three shaving teeth, has the feature of high strength and hardness for durability This Deburring Chamfer Tools quickly repairs damaged bolts and tightens the nuts in place, saving you time and money Description The operation of This Deburring External Chamfer Tools is very simple, using the lowest speed on the drill bit, and then slightly applying pressure to remove the burr. Moreover, the safety conscientious design means no harm hands, no sparks, and no burns. Versatile deburring drill bit tool effective on stainless steel, hardened steel, mild steel, copper, etc, no matter it is with or without screw thread. It can also be used as a bottle opener. Features Deburring External Chamfer Tools -Color:black. -Material:Steel. -Size:about 1.22 x 0.78 x0.27inch. This small bolt deburring tool is made of quality cemented carbide with high strength and hardness for durability. Package Including 2 * Deburring External Chamfer Tools