Harper jdcj8523 3-in-1 convertible hand truck with solid rubber wheels – 500 lb. Capacity easily converts to three different truck positions and auto locks into place with no pins or clips to lose!! harper trucks 3-1 steel convertible hand truck provides easy conversion from a two-wheel dolly to a four-wheel 45 degree incline truck or platform truck in seconds features: robotically welded 1″ steel frame and handle 500 lbs. Two wheel dolly handle height 44″ tall easily adjusts to four wheel assist incline truck or four wheel platform truck -500 lbs. Capacity 8″ solid rubber wheels and 3″ swivel casters 14″ x 7-1/2″ base plate large 34″ x 13″ platform bed