3-in-One MAX 1000 lb Capacity Convertible Hand Truck with Never-Flat tires 1000 lb Load Capacity as 4-wheel Hand Truck 800 lb Load Capacity as a 2-wheel Hand Truck and Assisted Hand Truck Never-Flat tires solid, maintenance-free tires Heavy-duty commercial grade aluminum and durable steel construction Easy to use: Quick 1-hand conversion- no pins or tools