Alpha AIR-658 is a high performance, pneumatic polishing tool designed for continuous production use. It has a centrally fed water distribution system that provides the best finishes possible. Alpha AIR-658 is a lightweight tool that accepts 3, 4, or 5-inch disks. It is a "plug and play" tool, which includes the side handle, a splashguard, pneumatic lubrication oil, and the hoses for air, water and exhaust along with the appropriate fittings. Does not include backer pads.