This B&P Liberator Hand Truck with Stair Climbers has a 600 pound weight capacity. With flared double grip, U-Brace handles, and a standard straight back frame, it won't twist or flex with a full load. With the added frame extension, overall height reaches 60 inches. 10" D6SS flat-free wheels have a light-weight poly hub, are non-marking and can't go flat. This hand truck has a front-mounted extruded aluminum nose and also features Stair Climbers with vertical geometry making it easier to ascend or descend stairs. The Stair Climbers are made of high-strength extruded aluminum with a thick, extra-long, reversible wear strip and has a two-year warranty.