Four in one function, for exercise all muscles, for indoor body exercise: 1. Dumbbell Stool 2. Priest Stool 3. Roman Chair 4. Supine Board * Wide distance is adjustable Suitable for the needs of all kinds of people * Squat, bench press Barbell bench press bracket height five levels adjustment. Free squat bracket height six levels adjustment. * The high position pulls back Mainly exercises the pectoralis major, arm muscle, back muscle * The sitting posture flexion lift Mainly exercises the brachial biceps * Barbell bench press Mainly to exercise the chest major,abdominal muscles, biceps