To be used with random orbital sanders 3M Precision Shaped Ceramic Grain cuts exceptionally fast, helping increase productivity 3M™ Cubitron™ II Hookit™ Cloth Disc 947A is easy to change and reuse X-weight cloth backing is tough and durable for aggressive sanding action Grinding aid helps to further reduce heat and grinding temperatures Resin bonding material resists heat and helps to prevent discolouration 3M™ Cubitron™ II Hookit™ Cloth Disc 947A offers revolutionary performance with 3M Precision Shaped Ceramic Grain on an X-weight polyester-cotton cloth backing. Our high-performing disc contains a grinding aid, making it ideal for medium to high-pressure applications on stainless steel and other alloys, along with carbon steel, cobalt chrome, and nickel alloys.