2 Brass Wire Cup Brushes. This a new set of 2 brass wire cup brushes. Great for polishing and finishing yellow metals such as brass and copper. They can be used with a Dremel tool. Each measures approximately 9/16" (14 mm) in diameter. Each has a 1/8" (3 mm) 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.