Jumbo 51pc Drum Sanding Kit - Fits Dremel - Includes Rubber Drum Mandrels - 1/2, 3/8 & 1/4" Outstanding value & quality - turn your Dremel or other rotary tool into versatile high-speed sander Perfect accessory to sand, shape, groove & finish soft & hard woods, fiberglass & more Two 1/8"-shank mandrels of each size - diameters 1/2, 3/8 & 1/4" Rubber expansion-drum mandrels - slide bands over drum & tighten screw for non-slip fit 45 aluminum oxide sanding drums in preferred 120 grit - 15 each in 1/2, 3/8 & 1/4" diameter