Portable Chin Up Workout Bar Home Door Pull Up Abs Exercise Doorway Wall FitnessStrengthen your back, biceps, and other upper body muscles in the comfort of your home with this Door Gym Bar. It is designed to fit conveniently in most doorway frames, or sit on the floor for push ups, dips, and sit ups. The Door Gym is an ideal choice if you want to get fit without buying expensive, space intensive weight sets. With no need for screws and bolts, the door gym can be used in almost any door frame. When installed in the doorway, it