What You Get - 2 pieces 1/4'' shank hook and loop sanding pad + 2 pieces foam buffering pad Size - Sanding Pad Diameter: 2 inch/ 50mm; Buffering Pad Thickness: 1/2 inch/ 13mm; Shank Diameter: 1/4 inch/ 6.35mm Sanding Disc Pads - Made of polyurethane, good flexibility for minimising heat transfer, not easy to break, durable for long time. Buffering Pads - Made of good quality sponge, great for uneven surface polishing, protect against damage to backing pad, convenient to replace. Wide Application - Work with most rotary tools such as die grinders, air grinders, electric drills, ideal for metal derusting, glass and ceramic polishing, marble, automotive and wood floor polishing, etc. Specification: Main Material: Plastic, Metal, Sponge color: as show Backing Pad Diameter: 50mm Sponge Diameter: 50mm Sponge Pad Thickness: 13mm Male Thread Size: M6 * 10mm Shank Diameter: approx. 6mm Operation Speed(Max.): 10000 RPM Package Included: 2 x 50mm Sanding Backing Pad 2 x 50mm Sponge Buffering Pad 2 x 6mm Shank