OTC 1769A Truck Dual Wheel Dolly This 1500 capacity dolly will remove transport and replace dual wheel and tire assemblies without strain or struggle Swivel casters 3-1/2 inch front and 3 inch rear provide easy maneuverability. Floor space is 43 inch by 42 inch Hydraulic jack provides over 6-1/2 inch of lift and tilts wheel assembly 7 degrees to prevent damage to wheel seal Includes a 6 feet support chain to hold load in place tester operates from either 110 volts AC or its own internal rechargeable 6-volt battery