5 New Diamond Coated Cutting Discs & Mandrels. This is a new set of 5 200 grit diamond coated cutting disc & mandrels. Great for cutting, grinding and cleaning metal. The diamond particles are electroplated onto both sides. Each disc measures approximately 1" (25.4 mm) in diameter. Includes 5 mandrels with a 1/8" 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.