Anytime Tools 5 DIAMOND CUT-OFF WHEELS GLASS ROCK LAPIDARY DISC SAW for ROTARY TOOLS Shank: 1/8'', Disc Diameter: 7/8'', Thickness: 0.031" Medium grit for cutting or sanding stones and glass Preforated for cooler cutting. Designed for Rotary Tools Includes 5 discs, 1 shank and a plastic storage case