1. Uniform sand grain, wear-resistant and durable, mold grinding 2. Uniform and fine sand grain, various specifications, suitable for all kinds of metal/non-metal, sharp and wear-resistant 3. Sharp grinding, improve efficiency, long-lasting sanding 4. Mainly used for DIY sanding, polishing, jade, jadeite, wood metal mold sanding, wood carving and other sanding/polishing/trimming/grinding 5. Material: grinding wheel + iron 6. Shank diameter: about 3mm 7. Weight: about 31g