The structure is made of steel, tough and durable, you can use it to hold all kinds of smooth surfaces, build muscle, lose weight very well and see the soft and comfortable real result without hitting the legs. Protective self-sucking is easy to move. The sturdy steel frame is built for extreme durability, and great assistance for the waist, abdomen, leg, body shaping, butt lift, and muscle. Its natural rubber sucker firmly grips the floor to ensure a safe and stable stand for training. Its max bear capacity is 330lbs. The soft and thick foam handles are comfortable against feet and prevent chafing. It features adjustable height to fit different needs and strong suction.