The Teeter EZ-Up™ Inversion & Chin-Up System works with any standard wood door frame (meeting the uniform building code) and can be your center for inversion. The EZ-Up™ Inversion System comes complete with the Inversion Rack and Gravity Boots. Without interfering with the normal use of the door, quick-disconnect locking brackets secure to the door frame and allow the Inversion Rack to be installed in just seconds. The Gravity Boots wrap comfortably around each ankle, securing with adjustable, self-locking ratchet buckles. Users simply hold onto the lower bar of the Rack, kick up to the upper bar, and rest each boot hook over the bar.