Features: Made of high-quality material, aggressive and durable, wear-resistant and high efficiency. Has the advantages of sharp grinding, fast glazing and high luminosity. For wet and dry polishing, for best results use polishing pads with water. With the backing pad, for easy connect and remove the polish pad. Great for all solid surface materials. Perfect for Granite, Concrete, Marble, Stone, Tiles etc. Specifications: Polishing Pad Diameter: 4in(100mm) Thickness: 3mm Backer Diameter : 4in(100mm) Max RPM: 12000 Pad grit: 1 * 50#, 1 * 100#, 1 * 150#, 1 * 300#, 1 * 500#, 1 * 800#, 1 * 1000#, 1 * 1500#, 1 * 2000#, 1 * 3000# Package Size: 24 * 17 * 5cm/ 9.4 * 6.7 * 2in Packing Weight: 350g/ 12.3oz Package List: 10 * Polishing Pads 2 * Drill Adapters 2 * Backing Pad