When used properly, pressure is relieved from tendons and muscle tissue. Tool-free assembly and the capability of fitting over nearly every door. Treatment is patient specific in conjunction with a physician, determines how much water to place in the weight bag. The time of use should also be determined by a qualified physician. Complete set includes a water weight bag, a cervical spreader bar, a nylon braided rope, an over-door traction clamp and an adjustable hook-and-loop halter. Assembly is easy and tool free. Weight bag can be filled from 2 lbs. to 20 lbs. All parts of the head halter are latex free. Traction weight bag features leak-proof seal.