3 Assorted Rubber Polishing Burs. This a new set of 3 assorted rubber polishing burs. They can be used with a Dremel tool. The mandrel has a 3/32" shank. 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.