Use 3M � Cubitron � II Hookit � Clean Sanding Abrasive Disc 737U to remove paint, shape body filler, fine feather-edging, final prep before priming, or even surface structure removal of clearcoats and preparation of blending areas. 3M developed 3M � Cubitron � II Hookit � Clean Sanding Abrasive Discs 737U for superior cut and long disc life during these key stages in auto body repair. It features 3M � Precision Shaped Grain technology. This triangular shaped grain cuts 30% faster and lasts at least 30% longer than traditional ceramic abrasives. With its wide range of grades available, the disc is ideal for many sanding applications in collision repair. Cubitron �II products have raised the bar for high performing abrasives. The combination with the multi-hole pattern on our abrasive disc offers excellent dust extraction, further increasing cut rate and disc life. 3M � Cubitron � II Hookit � Clean Sanding Abrasive Discs 737U attach to a hook‐and‐loop backup disc pad, can be removed cleanly and easily, and can be re‐used again and again for the extent of the abrasive life. When used with a 3M � Clean Sanding Disc Pad, the disc holes do not require alignment with the pad holes, making switching the discs fast, easy, and convenient.