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Norton® NORZON PLUS® BLUEFIRE™ R884P 50 Grit Zirconia Alumina Quick Change Cloth Disc has 4" Dia making it ideal for heavy metal removal, weld grinding and blending, light deburring and finishing. Cloth disc with TS Type II attachment features improved Y-weight, 2-ply polyester backing and semi-open coat design. Quick, tool-free disc changes results in more grinding time. It locks to back-up pad and can be removed easily. Disc with resin bond enhances base adhesion and decreases grain shedding. It can be used on a wide range of materials and various applications from light- to heavy-pressure applications. Durable disc reduces loading on soft metals, wood, stainless steel and carbon steel. Disc that twists on and off in 2 1/2 turns has SPEED-LOK® fastener. It offers cooler cut and long life while reducing edge-wear. It can be ideally used in weld grinding/blending, heavy metal removal and light deburring/finishing.