Diamond Lapidary Grinding Wheels and lapidary polishing wheels grinding hard materails,It's Grinding is Clean Fast. The premium lapidary wheel for general use in grinding and sanding gemstones, rocks, ceramics or glass. The bonded is electroplated diamond on the peripheral surface of a precision turned, seamless, steel rim.They are particularly well suited for glass beveling, cold glass working and lapidary working, Our weheel has steel ring and plastic core,it has a 1" arbor comes with bushings to adapt to 1/2, 5/8 or 3/4 inch shafts. Available in a variety of grits and sizes.