When our gym got these they were so popular you couldn't even get on them. My husband and I decided to get a set for our home too. It attaches to any beam or pole. We attach ours to one of the beams in our garage. It is easy to install and use. There are so many exercises you can use it for, lunges, squats, tricepts, etc. It uses your own body weight so also great for those who are worried about using heavy weights. It is lightweight and portable so you can take it with you on trips. All you need is something to hang it from. Comes with a draw string bag for storing or traveling with it. Also great for times when you can't get out of the house (kids napping, etc) when you just want to do a 20 minute workout.