Features: new high quality Made of high-quality materials for durability Wet and dry use, electroplating process. 4" 100mm Coated Flat Wheel Jewelry Polished Grinding Disc 80~3000 Grit Application: Widely used in metal, jade, for Crystal, agate, handicrafts, gems, glass products, for Crystal, carving tools and other industries. Suitable for: jade polishing, stone grinding, engraving, wet and dry use, can be used with angle grinder or electric drill. Product parameters: Material: Emery Outer Diameter: 100 mm/4 inches (approx.) Thickness: 1mm/0.04 inches (approx.) Toolbar Hole: 16mm / 0.63'' (Approx.) Optional granularity: 80#, 120#, 150#, 180#, 240#, 320#, 400#, 600#, 800#, 1000#, 1200#, 1500#, #, 3000# Recommendations: Sealing kn ife, etc.: If it is dull, it is recommended to use 500# to sharpen the kn ife first, and then use 1000# or more to sharpen the . Coarse grinding and fine grinding of seal stone: 240#-1000# Metal: Rough grinding below 500#, fine grinding above 1000#. Glass: 500# polished to not cut hands, 1000#-3000# polished to smooth Peeling rough stone: 120# Please note: 1500#-3000# is mainly used for polishing due to the finer sand particles and thin sand layer, and the removal force is low. Suitable for polishing objects that have been polished to a relatively flat . If used for rough grinding, it may affect the use of the grinding disc. life, or even damage the sand , please choose the correct mesh according to the grinding needs. Package Included: 1 * Wheel Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data.