Our 3M? Hookit? gold disc 236U is precision-coated for long life during auto body sanding projects requiring moderately coarse grit abrasives. Open coat aluminum oxide abrasive and C weight paper backing provide durability and a long-lasting cut for rough feather-edging or shaping plastic filler and putty. Load-resistant coating and available six-hole pattern provide superior dust-resistance. Open coat construction means the abrasive grains on our 3M? Hookit? gold disc 236U are placed with space between them to help evacuate sanding dust and other debris to avoid clogging the cutting edge of the grains. The load-resistant coating on the abrasive grains also allows the disc to continue cutting even when sanding paints, fillers, putties and other materials that would otherwise clog the disc and hinder sanding ability. All of this adds up to increased productivity and reduced material consumption.