The red devil diy glass cutter tool is ideal for general cutting on standard glass. It is crafted with a steel wheel and made of zinc die-cast for the do-it-yourself craftsman. Features: made of zinc die-cast steel wheel ball end ideal for general cutting on standard glass product specs: meets us government specs. Ggg-c-751, type 1, class 1, material b nsn no. 5110-00-222-4400 Packaging:pouch