The Merit rubber expanding drum has a 3/4" drum diameter and 1" drum width to securely mount sanding sleeves with a 3/4" inside diameter onto a grinder that accepts a 1/4"-diameter shank. The rubber drum expands when rotated, holding a sanding sleeve in place without the use of adhesive or clamps. It has a 1/4"-diameter shank that inserts into a grinder's chuck.

Merit Abrasives manufactures abrasives for the deburring and finishing industries. Merit, founded in 1945 and headquartered in Cleveland, OH, meets International Organization for Standardization (ISO) standards 9000 and 14001.