... polishing for stainless steel, metal and mold,etc... Product Description:velcro abrasive disc Silicon Carbide Velcro Sanding Disc (velcro or PSA) be fixed ... mold, and so on. Bond: Resin over resin Coated material: Silicon carbide Dimension ( diameter): 4"(100mm), 4.5(115mm), 5" (150mm), ... Hole pattern: Without holes / 6 holes / 9 holes. We can product different hole pattern as customers' requirements.