Covington 6" diamond combination unit, Model No. 495DCU has the same basic features as the Model No. 494SCU (silicon carbide unit). Saw, grind, sand, and polish gemstone material by machine with this complete diamond combination unit ready to go. Features: sealed ball bearings mounted in rubber for quiet and smooth operation, completely mounted on "Lam-I-Cushion" base, rust-proof aluminum castings, continuous variable speed control, quick change hood and buff, adjustable cab and wheel rest. Comes complete with a 6" triple-charged diamond blade, slab vise, water valves, wipers and drains. The silicon carbide wheels have been replaced with 100 and 220 grit metal bonded diamond grinding wheels. In addition, a 1200 grit diamond sanding belt and 5 each 400 grit silicon carbide belts are included for the expando drum. For polishing on the leather disc, a 2 gram syringe of 50,000 mesh diamond compound with a 2 dram bottle of extender fluid (thinner). The 6" combo unit by Covington comes complete with starter kit, book about using diamond abrasives, instructions and guarantee. A DISCOUNT WILL BE APPLIED AT THE SHOPPING CART! FOB direct from the factory, Covington Engineering, Redlands, CA.