Upgraded Multifunctional Design--Helping you play sit-ups,push-ups, side kick,belly movement,stretching back,elbow plank,press-up,etc.Good to exercise your abdomen,reduce abdominal muscles and shape your body. Portable--Light weight and portable design,small occupation,portable for a work out anytime,anywhere,easy to install and Storage,convenient to use. High quality metrial--The thick foam soft and comfortable, protect the instep from pain.The cold-rolled steel with high strength, high hardness and bright surface.5 inch diameter large suction rubber chassis with strong suction and stability. Easy Installtion--Easy for home installation without any tools,find a clean flat ground first,then put the sit up bar on the ground and pull down the lock.Last adjust the gear position to fit your feet. Note:Couldn't use on wooden floors.Apply to smooth floors:1.tiles floor 2.concrete-cured 3.any other smooth floors.Make sure the floor and the sucking pad are clean before using(Add a little water can easy to sucking it on the floor).