Sanding Bands Diameter: 1/2"(12.7mm) 3/8"(9.5mm)1/4"(6.35mm)Mandrels Shank: 3.175mmFor random orbital sanders, provides grinding and polishing tools for wood, aluminum alloy, fiberglass, rubber, stone, painted surfaces, plastic and non-ferrous metals.for sanding a variety of surfaces, for finely sanding car paint, primer, body filler, and paint prior to painting, or for removing scratches from wood and paint.Our sandpaper is great for auto body and paint shops, woodworking wood furniture manufacturing, metalworking metal sanding, crafts, home furnishing, drywall, industrial, fiberglass, plastic, or any other surface that needs to be sanded.Package Including:132pcs Sanding Drum Set.Note:1, The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2,Please allow slight manual measurement deviation for the data.