Any standard wood doorframe* can be your center for inversion with the EZ-UpTM Inversion System, which 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 doorframe 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. Easy-reach handles and comfortable foam handgrips allow for mounting and dismounting with ease. The double-bar system enables you to hang freely out and away from the frame - allowing for maximum mobilization during your inverted workout. EZ-Up Inversion Rack: Double-Bar System: Makes mounting and dismounting easy Quick-Disconnect Locking Brackets: Secures the rack to the doorframe, but allows for easy removal. Locking bracket is easily installed with screws (included) on the door frame High-Quality Finish: Scratch-resistant powder coating for years