Power Up Chin-up

No need to drill, screw or break anything to have a door chin up equipment. Heck I even use it on a 2 hinge door and it holds my weight 180 lbs. Doing a chin up on it is abit harder because you can't swing your body hence no momentum to assist you, making it more effective IMHO. I'm currently doing 8-10 full rep chin up with it!!!