General description Made of extremely hard stainless steel, this Deburring External Chamfering Tool is designed for durability, rust, and corrosion resistance. It is a safe and efficient solution for quickly repairing damaged bolts and tightening nuts without causing harm to your hands, producing sparks, or burns. This tool simplifies the repair process, making it a great helper for both industrial and household applications. Technical specifications Material: High-speed stainless steel Size compatibility: 5/16-32 bolts (.164) up to 3/4″-10 (.750) (8mm - 19mm) Usage Attach the deburring external chamfer tool to the end of your power drill. Use the lowest speed on the drill bit. Apply light pressure to remove the burrs.