Big Horn 19521 grinding drum set allows your drill to double function as a spindle sander. Get ready for virtually any job with this high quality drums and sleeves set. Includes five expandable drums in sizes 1.5" x 2.5", 1" x 2.5", 3/4" x 2.5" and 1/2" x 2". Also includes two sets of ferrules (two fine sets and two coarse sets). These drums can also be used in hand drills for hands free grinding. A selection of four popular size rubber sanding drums with two 120 and 80 grit sanding sleeves for each drum.