Flexible composite material, ergonomic design, comfortable hand feeling. The base size is suitable for any 5 inch sheet of sandpaper, so it is easy to replace the disc. It is the perfect sanding partner. The sides are slightly angled and can be easily sanded in grooves or tight spots on flat or curved surfaces. Sturdy hook and ring attachment prevents the backing plate from shifting and spinning, but the sand disc can be easily removed. The front side is a sticky disc, which can be used to stick various back velor polishing products, such as polishing pads to dry, sponge sand, water polishing pads, etc. It is suitable for spraying industry, furniture industry, automobile industry, chain production and other fields. Very suitable for woodworking, hobbies, crafts, car bodies, plasterboard, shops and cars.