-Package included: 1 PC x Head Harness.Adjustable Head Harnesses are technically constructed to strengthen your neck and muscles and bring them to a level where, with other conventional harnesses, one can only desire. .LIFETIME WARRANTY: Order now and receive your sturdy neck harness with a money back guarantee: If you are not satisfied with the neck exerciser, simply request a refund no questions asked. .35.5 inch metal chains and D-shackle Fully adjustable hook and loop closure. One size fits all head sizes.35.5 inch metal chains and D-shackle. Fully adjustable hook-and-loop closure. One size fits all head sizes. .