Features: Upgraded your marble, stone tile, and project with 7pcs 4inch convex wet polishing pad featuring bowl grinding plates for efficient material removal and mirror like finishes. Crafted with high density resin metal and synthetic materials, this set includes 100-3000# pad for progressive grinding to polishing in wet application. Ideal for professional stone fabricators, construction crews, and serious requiring preparation on countertops, flooring, and architectural stonework. Perfect for bathroom renovations, kitchen countertop installations, and commercial stone restoration projects where wet polishing is essential for clean workspaces. The standardized 100mm diameter ensuring suitable for angle grinder and polisher, improve edge contact during marble polishing operational Specifications: Component:Metal Size:Approx.10cm/3.94inch Number of subjects: 50#/150#/300#/500#/1000#/2000#/3000# Package Includes: 7Pcs Grinding Discs note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.