About this item Application: Strip and clean disc for Faster and Effective removes rust, dirt, paint, weld spatter, scaling, oxidation and other surface contaminates. No Scratches: Strip disc for wood, metal, fiberglass and concrete without gotten caked with dirt. Working extremely well and fast at removing rust but it didn't leave any deep scratches or anything. Less peeling, low grinding sound and less dust. Durable: Paint and rust stripping disc has Reinforced fiberglass backing plate and an extra course abrasive for longer life. Blue clean and strip discs has a longer life than black clean and strip discs. Size: 5 inch strip & clean disc is made for 5" Angle Grinder. Material: Paint and rust stripping disc uses wear-resistant non-woven fiberglass backing and combines resin elastomer and high-quality diamond with a special process to form a high-strength, high wear-resistant grinding wheel. It does not damage the surface of the object, has uniform grinding force, uniform processing effect, wear resistance, strong water resistance, strong plasticity, and good softness.