1-Inch dia by 1-Inch replacement sleeves are designed to be used with Big Horn 19530 15-Piece General Purpose Sanding Drum Set (sold separately)No-lap aluminum oxide resin bond sleeves Includes: 3 x 50 Grit - Coarse | 3 x 80 Grit - Medium | 3 x 120 Grit - FineExcellent for sanding holes, edges, contours, and irregular shapes Made by Climax Metal ProductsMade in USA