This B&P Liberator Hand Truck with Stair Climbers has a 600 pound weight capacity. With a loop grip 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" 4 ply pneumatic wheels have a two piece steel hub and precision bearings. 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.