Specification: Size: 100 mm/4" Grits: 30,50,100,200,300,400,500,600,800,1000,1500,2000,3000 Quantity: 14pcs Features: --Sharp, wear-resistant and high efficiency. Optimal RPM 2200, Max RPM 12000. --Works good for Wet or Dry polishing of stones. --Perfect for Granite, Concrete, Marble, Stone, Tiles etc. --Pro Grade Wet/Dry, Diameter 4", Height 3 MM, Velcro Backed Flexible. --Aggressive and Durable made with quality Diamond Powder impregnated in Resin. Package Included: 14 x Polishing Pads