Plain Grooved Forming Ring Mandrel For Holding, Shaping & Straightening Rings. This is a new plain grooved forming ring mandrel. Great for jewelers, goldsmiths, silversmiths and metal workers. Used for holding, shaping and straightening rings, hoop earrings and small bracelets. It measures approximately 13 3/4" (34.925 cm) long 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.