43-Piece 4 Diamond Polishing Pad & Backing Plate Kit. 40 Diamond Polishing Pads + 3 × 4 Backing Plates. Professional diamond polishing accessory kit designed for stone fabricators, countertop installers, contractors, remodelers and users who need a large quantity of diamond polishing pads for ongoing grinding, polishing and finishing work. With 40 pieces of 4 diamond polishing pads plus 3 backing plates, this kit provides multiple pads at each grit and convenient replacement backing plates for extended use. (A) 3 × 4 PVC Backing Plates. Diameter: 4 / 100mm. 5/8-11 Female Thread Arbor. Maximum Capacity: 5,000 RPM. Designed for compatible polishing machines. Use with compatible 4 diamond polishing pads. Multiple backing plates provide convenient replacements or allow multiple pad setups. Maximum backing plate speed: 5,000 RPM. DO NOT use these backing plates with a high-speed grinder or polisher exceeding the rated RPM. Always verify spindle compatibility and operating speed before use. (B) 40 × 4 Diamond Polishing Pads. Wet/Dry Use – Wet Use Recommended. 8 × Grit 50. 8 × Grit 100. 8 × Grit 200. 8 × Grit 400. 2 × Grit 800. 2 × Grit 1500. 2 × Grit 3000. 2 × Grit 10000. TOTAL: 40 DIAMOND POLISHING PADS. The multiple pads at the coarse and intermediate grits are especially useful when working on larger projects or when replacement pads are needed during production. The kit provides a broad range of grits. 50? 100? 200? 400? 800? 1500? 3000? 10000. The lower grits are used for more aggressive grinding and scratch removal, while progressively finer grits are used to refine the surface and develop a smoother finish. The 50-3000 progression is commonly used for stone polishing applications, with finer finishing steps used when appropriate for the material and desired result. Designed for polishing and finishing suitable. Granite? Quartz? Marble? Travertine? Terrazzo? Sandstone? Concrete? Natural Stone? Engineered Stone. Contractor and jobsite use.