The Spine Strap makes it possible to set up a full workout station anywhere you have a door. Its setup is easy, and it features an anti-slip clasp on the back of the spine to securely hold it in place, so you can push yourself with confidence during exercise. The strap features seven anchor points going from the top to the bottom of your door, allowing you to diversify your exercises for a versatile, full-body workout. It is a perfect complement to Slastix resistance bands, but it's also compatible as a cable machine attachment, or with any other equipment you have. Simply anchor any band or cable you have to the Spine Strap, and you'll have a reliable base for your at-home workout station. On an average door size, the seven anchor points on the Spine Strap range from roughly 75 inches high to just a couple inches above the ground, so you can customize your workout with countless exercises to maximize your potential. The Spine Strap is compatible with any door up to 85 inches (roughly 7 feet) in height, and its design keeps your door safe from being damaged. For doors taller than 85 inches, it is recommended to purchase the Spine Strap Extension to lengthen the strap another 24 inches.