The hand truck's frame is made of high quality aluminum alloy, Only weighs 20 lbs, light weight but sturdy.The ergonomic design makes it ideal for home or work. This stair climbing hand truck features two non-slip handle designs and a three-wheel design for comfort and safety. Stair climber hand truck Max flat level ground weight capacity:550 lb. Max stair climbing weight capacity: 440 lb. Stair climbing hand truck nose plate: 18 Wide x 7.5 Deep; Overall size: 20" D x 18" W x 60" H.