The tool's -coated provides exceptional durability, ensuring that the tool can withstand heavy use over long periods of time. The tool's high-efficiency grinding capabilities allow for fast, precise drilling and a perfect finish every time. Conical design grinding punch for round holes in leather, this innovative tool features a -coated for unrivaled durability and efficiency during the polishing process. The tool's tapered shape is designed for machining to precisely and efficiently grind round holes in leather products. The tool's tapered design easily grinds the inner and outer edges of round punches from a minimum diameter of 2 mm to a maximum diameter of 15.5 mm. The internal grinding range is 3-18mm, and the external grinding range can reach 16mm., Manufacturer: Jnchdghwa