Flanged side-plates increase strength. Full swivel rear castors for easy positioning. Sealed hydraulic unit for improved reliability. Automatic valve prevents overloading. Cast iron bell crank for heavy duty loads In-line pump for easy alignment. U-joint release for exact positioning -Removable one piece handle for easy transport. Specs: . Handle: 48 3/4". Low height: 9-7/8". High height: 20 1/4". Capacity: 4,000 lbs.. MADE IN THE U.S.A.