Chain Hoist, Manual Chain Hoist, Max. Door Height (Ft. ) 16, Max. Door Width (Ft. ) 22, Commercial, Industrial, Residential, External Gear Drive, Standards 1 in Bore, Includes (2) Set Screws, 1-1/4 in x 1 in Key, 36 Tooth x #50, 1 in ID Sprocket, 4 ft #50 Roller Chain, Chain Keeper Bracket. This item has been restricted from sale in the following state (s): []