The Original Door Dolly is OUR BIGGEST SELLER !!! 3 SIZES AVAILABLE! STANDARD SIZE (OD1)has Inside Dimension of 2" and fits typical commercial doors up to 1-3/4" thick. (OD2) has Inside Dimension of 2-5/8" and (OD3) has Inside Dimension of 3-3/4". With TWO 675 pound capacity non marring wheels, The Original Door Dolly is ready to carry doors throughout the josite. She easily rolls over power cords and other small construction debris. Steel reinforced at the base.. . if you can put a door in her she can definitely handle it. Has safely held and carried a 600lb ballastic door and it took 3 grown men to put it in the dolly. This dolly balances and safely holds a door without leaning it against the wall. The Original Door Dolly weighs only 12 pounds. When determining the RIGHT dolly for the job, choose a size slightly larger than your load thickness. IF YOU NEED TO MOVE an item that is 4 inches thick or more , CHECK OUT OUR WIDE BODY DOLLYS. Need a custom size ? Just give us a call (954) 448-6872 U.S. PATENT # D550921S