Our 3M™ Microfinishing PSA Film Disc 268L features micron-graded aluminum oxide mineral, which is bonded to a durable polyester film backing, to produce a fast cut-rate and uniform finish on wood, solid surface composites, metals, plastic and fiberglass. Tear resistant disc withstands heavy usage, prolonging abrasive service life. Fast-cutting aluminum oxide mineral provides a uniform finish. Pressure Sensitive Adhesive (PSA) backing for easy attachment to abrasive tools. May be run wet to reduce loading and airborne residue. May be used on a variety of substrates, including metals, hardwoods and softwoods.