The Smith's Glass Saver solves a common household problem. If you have a chipped or sharp edge on a valued piece of crystal, fine china, or everyday glassware that is unsafe to use, Smith's Glass Saver will quickly smooth the dangerous sharp edge making the item safe to use again. The Glass Saver uses a retractable fine diamond-coated rod to smooth the sharp surface. The diamond rod retracts into the handle for compact storage and rod protection. There is a quick reference weights and measures table imprinted on the back.