3M 7100009701 Back-up Pad is a gray, hook and loop attachment type pad designed for random orbital sanders. It is suitable for finishing, polishing, and surface preparation applications. The pad's maximum speed is 12000 mps, with a medium density rating. It has a front color of black and an overall thickness of 0.5 in (12.7 mm). The pad has 31 holes, with a center hole diameter of 0.75 in (19.05 mm), and is compatible with various industries including AOEM, aerospace, composite, cutting tool manufacturing, general industrial, MRO, metalworking, paint preparation, primary metal, transportation & heavy equipment, and woodworking.