This CRL Machinery Bench Model Belt Sander uses all standard 4" x 64" (102 mm x 1.63 m) Wet or Dry Abrasive Belts, and is specially designed for use in the shop or on the job site. It's perfect for bench work where there is only a limited need for edge-work capacity. This Sander can also be mounted right onto a glass truck for rough grinding, smoothing, and polishing the edges of glass on a job site. Water for wet grinding sprays on the back of the belt from a built-in spray bar connected to a built-in water tank. Just pour water in the holding tank and you can wet grind anywhere.