Built for durability and comfort, this is the ultimate muscle fitness training tool to strengthen and develop your shoulders, back, arms, and abs, and more. There’s no better way to take your upper-body workout to the next level. The XPower Chin-Up Bar mounts easily to any doorframe to become your own personal gym. The custom design with 12 grip positions makes this the perfect tool for chin-ups and pull-ups. Place the excerciser bar at the bottom of a door frame and it grips itself to the frame, allowing you to place your feet underneath for sit-ups, crunches, and other abdominal excercises. Quick and easy assembly.