Big Horn 19535 12 piece extra long sanding drum set includes sizes 1/2x2, 3/4x2, 1x2 and 1-1/2x2. All sanding drum kits feature aluminum oxide resin bond spiral no-lap sleeves. Self expanding rubber cushioned drums have 1/4" shank. Excellent for sanding holes, edges, contours, irregular shapes and wider surfaces. Each set includes 1 set of replacement sleeves.