High Quality: This sharpener guide is made of high quality steel material. Professional and practical design, convenient to carry. Use with Sandpaper: This product is an auxiliary sanding tool that needs to be used with sandpaper sanding strip, etc. It's a practical tool to help you save the energy when sharpener the leather cutter head. How to Use: Just place the sandpaper over the corresponding slot of the repairer and sand it back and forth in one direction according to the. Square groove, the edger is polished on the front. U groove, the edge of the edger is polished. Suitable Object: The general leather processing heads are very small, which is inconvenient to master the direction. This tool can solve your troubles. Rail slots design can help you polish your tools better. Suitable for 1-6mm chamfering. 2 Type: Front R groove grinding 1-6mm edging device, groove surface can be polished flat punch, dig, push groove. The back square groove can grind the back of edgeware can polish shovel.