DEWALT DW433K 8 Amp 3-Inch-by-21-Inch Variable Speed Belt Sander Kit with Dust Canister and Case Powerful 8.0 Amp motor aggressively removes material in a variety of applications All-metal housing increases durability during a drop Three wheel design delivers lowest center of gravity and longest 3-inch X 21-inch platen available variable speed dial allows user to vary speed for specific materials and various applications (100-350 spm) Innovative dust collection unit is 20% more efficient than conventional dust bags; Dust collection shut-off valve eliminates dust stream toward user when collector is not in use