MTP Tm 60 Pcs Diamond Burr Bits Drill Glass Gemstone Metal for Dremel Craftsman Rotary Tool 1/8" Shanks w/ Box Tip MTP TM 20 pc variety of bits per box, come with 3 boxes , total 60 bits 1/8" shanks good for most rotary tool such as Dremel , Craftsman , B&D and more Medium grits perfect for carving , sanding, etching and more Work on glass, metal , stone, ceramic, wood, plastic Storage case w/ cover