Pro Tools Express 5 Diamond Cut-Off Wheels Glass Rock Lapidary Disc Saw for Rotary Tools Includes 5 discs, 1 shank and storage case Designed for Rotary Tools Shank: 1/8", Disc Diameter 7/8", Thickness: 0.031 Medium Grit for Cutting or Sanding Stone and Glass Perforated for Cooler cutting