One inch wide abrasive strips offer good conformability Abrasive strip refills are available both scored (for finer, less aggressive work) and unscored Refills load quickly and easily by turning the index knob as needed, allowing you to change grit size in minutes Sand-O-Flex wheels will fit most electric drills, and with an adapter will fit most bench grinders For use on a variety of materials including metal, wood, plastic, rubber and ceramic These Sand-O-Flex refills feature Merits 350-RP aluminum oxide abrasive with a glue bond. The Sand-O-Flex Wheel (sold separately) is 6-1/2 diameter overall with a 4 diameter high-impact plastic body and a 1/4 diameter steel shank. With firm cushioning brushes (replacement brushes sold separately), Sand-O-Flexs abrasive strips are forced into, around and over corners, hollow and fluted surfaces, and small openings. Pressure is distributed evenly over the surface to prevent loss of detail and the flattening of rounded areas for sanding metal, wood, plastic, rubber and ceramic. Package of 10.