The 3M Hookit Gold Disc 255P/216U is a precision-coated disc with a long life and exceptionally smooth finishing to auto body sanding projects. It features light A-weight paper backing with sharp, durable aluminum oxide abrasive – a fast, aggressive cut, yet a uniform finish for feather-edging and primer sanding. Load-resistant coating and various available hole pattern provide good dust resistance.Use 3M HookitGold Disc 225P/216U for finer grade sanding; along with light A-weight paper backing it's ideal for feather-edging, as a final step before priming or for primer sanding. With its open coat construction and aluminum oxide mineral abrasive, it provides a sharp cut. It works great on substrates like clear coat, fiberglass, paint, primer and plastic. Open coat construction means the abrasive grains on our 3M Hookit Gold Disc 255P/216U 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 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.