The MK-1503-S wet polishing kit from MK Diamond Products is designed for handheld grinding and polishing of marble, porcelain, granite and engineered stone. This polisher/grinder attaches to a standard hose to enable a steady flow of water through a control valve. The unit features a shaft lock for easy backer pad removal, quick release power switch for safety, easily removable disc guard, and variable speed control. The maximum polishing disc size is 5 inches. The kit comes with water hose attachment, GFCI, D-handle, side handle, gear box cover, carrying case, set of premium 4-inch resin polishing discs and a 4-inch rubber backer pad.