2 Steel Wire Cup Brushes. This a new set of 2 steel wire cup brushes. Great for polishing and finishing metal. They can be used with a Dremel tool. Each measures approximately 9/16 (14 mm) in diameter. Each mandrel has a 1/8 (3 mm) shank. FindingKing works hard to update our descriptions and pictures of our merchandise. As part of a proce...