Product description1. 300 Pieces Sanding Sleeves in Three Different Sizes : These rotating sanding belts contain 3 abrasive grains (80#, 120#, 240#) and 3 diameters (1/2", 3/8" and 1/4" ) there are 30 pieces for each grain and size2. 6 pieces. Rubber Sanding Rollers + 1 Dual-Purpose Wrench : 1/2, 3/8 and 1/4 inch diameter; Length of 38, 40 and 42 mm; Diameter (shaft) of 2.35 and 3.17 mm. each size has 2 pieces. 1 dual-purpose wrench3. Multipurpose The grinder can be used for home use, crafts, woodwork, carving, polishing, grinding, metal polishing, rust removal, painting, paint removal for metal, modeling, etc. Suitable for materials such as ceramic, stone, glass, wood, etc.4. Easy assembly : Rubber grinding rollers of different sizes serve grinding bushes of different diameters, which is convenient for installation and use. To attach the sanding sleeve, turn the screw in the sanding roller to enlarge the rubber part and to hold the sanding sleeve firmly around the rubber part while working.5. Highly compatible : Common and standard size suitable for all rotations. The grinding sleeves are suitable for all standard grinders (e.g. as a replacement for Dremel grinding sleeves). "