This R-Type die grinder surface conditioning discs is mainly used for surface coating treatment of metal, wood, plastic, ceramic, marble, aluminum surface finishing, car polishing and other materials, cleaning, welding seam polishing, rust removal, deburring, etc. 180 Grit / 320 Grit The metal grinding disc nylon fiber wheel is anti-clogging, and wet-grindable. The fiber mesh cover is firm and solid, not easy to be damaged under pressure, safe and stable operation, with little jitter. It is an ideal choice for mild and moderate polishing requirements. This Quick Change Nylon Fiber Surface Conditioning Discs has a moderate polishing strength, and it will not have the super exploitative ability like the flap discs, nor will it polish the surface of the object like sandpaper.The fiber mesh cover is firm and solid, not easy to be damaged under pressure, safe and stable operation, with little jitter. Specification： Product Name: Quick Change Discs Color: Green / Red Material: Nylon Fiber Scouring Pad Diameter: 75mm / 3inch Type：Roll Lock/R-Type Use with Die Grinder Grit: 180# / 320# Package Content: 11Pcs Nylon Fiber Surface Conditioning Sanding Discs Set SIZE 320 Grit 180 Grit Thickness Contrast Use with 1/4inch (6.35mm) Die Grinder The nylon fiber quick change discs has super elasticity, can fully contact the product workpiece during grinding, and can effectively prevent excessive cutting and scratching the surface of the workpiece. Unique Material The Non-Woven abrasive quick change disc is anti-clogging and wet-grindable. 1/4inch Round shank can use with for rotary tools. Such as electric drills, hand drills, die grinders, air grinders, angle grinders and other pneumatic tools.