Conical design grinding punch for round holes in leather, this innovative tool features a diamond-coated surface for unrivaled durability and efficiency during the polishing process. The tool's tapered shape is designed for precision machining to precisely and efficiently grind round holes in leather . The tool's diamond-coated surface 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. The tool's tapered design easily 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. Colour:silver-gray Material:Emery + stainless steel Size:about 75mm Package Contents: 1 x Round Hole Punch Polisher Grinder Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.