Foredom's belt sander attachment offers a power assist to sanding jobs. Use to power sand and smooth metal, wood, acrylic and composite materials. All metal quality-machined aluminum device attaches with ease over the top of a Foredom H.30® handpiece with supplied hex key (also fits H.30SJ and H.30H). Has 3 permanently lubricated ball bearings. Sandpaper belts measuring 7mm (9/32") x 257mm (10-1⁄8") come with the attachment and are available separately in 5-packs or assortments. Includes belt sander attachment and 10 belts. A 180 grit belt comes installed and there are 3 each of 100, 180, and 240 grit belts. Specifications: 4-7⁄8" long x 1-3/4" wide (at widest) x 2" tall. Ship weight: 8 oz.One year warranty.