The Hammer Head Yoga Stretch Straps are designed to be used with the Hammer Head Anchor Gym. The straps are made from a strong, durable 1500 pound test polypropylene which is available in either a length of eight-foot or four-foot long. Each of the straps have a 10 inch loop at the ends to allow for easy placement onto the hooks of the hammer head anchor gym or any similar type utility. These straps are a must have for all avid gym attendees and have outstanding durability to last a life time.