12 New Sanding Discs & Mandrel. This a new set of 12 sanding discs and mandrel. These are ideal for polishing and cleaning all kinds of wood and metal They can be used with a Dremel tool. Includes 4 coarse, 4 medium and 4 fine sanding discs. The mandrel has a 1/8" (3 mm) shank. Comes in a plastic case that measures approximately 2 3/4" x 2 1/2" x 7/8" (70 x 64 x 22 mm). We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.