Description: High heat resistance and High Quality. High grinding efficiency, can grinding & polishing quickly. No-dust ollution, safe & reliable. Long service life. Easy to use, greatly save manual labor, and save production cost. For DIY polished engraving, cutting, polishing (wood, metal, mold polishing purposes) Can process metal or non-metal parts and various artwork. Specification: Material: chrome corundum Size: 6mm Package Includes: 10 Pieces Polishing Grinding Head