MK Diamond's rear exhaust pneumatic polishing tool is designed for continuous production applications. Lightweight and compact, the MK-1503 Air Polisher is one of the most durable tools of its kind on the market for polishing stone. The water-tight sealed bearings provide long life and smooth rotational speeds. The water and air controls on the tool are simple to use and located for operator convenience. This tool's versatility allows for 3, 4, and 5 inch discs to be used.The air vent is at rear of tool so that exhaust is carried away from operators' hands by the hose protector.The MK-1503 Air comes comes with 25' water hose, 5' air hose, 3' air/water hose protector, and side handle, wrenches. The MK-1503 Air kit also includes 4" resin polishing disc set, hard rubber back plate disc, and carrying case.