Designed for the complete upper body workout, the door gym offers a variety of different exercises that can be done in the comfort of your own home, you can use the exercise for: Chin Ups Sit Ups Dips Sit Ups. Also has the added convenience of coming of the door frame for storage and convenience. The Door Gym needs to permanent fittings, as the unique design allows you to flick it onto a door frame, with the door frame taking the weight of whoever is using it. It also flicks back down when you are finished. The Exercise Bar is also easy to assemble and is designed for most standard size door frames. Can hold up to 300lbs Please note - Part No. 5 on the diagram is a printing error, and is not included in the parts. You will not need this item to assemble your bar