So you want to train at home like a gymnast? You are going to need the right tools. The CoreX Gym Rings + Door Mount is a simple kit designed to help you work on your body at home. The CoreX Gym Rings are made from wood and provide you with a comfortable grip. You can anchor them to your door in seconds. It lets you try pulldown exercises such as triceps, back, lats and upright rows at home. Sets you back under $60 at this time.