The J-Hook Aviation Headset Hanger is designed to be installed on one of the tube crossmembers in the cockpit of aircraft with exposed tubing upon which to hang your headsets when not in flight. These types of aircraft include Huskies, Cubs, Citabrias, etc. This makes entering or exiting th eaircraft much easier an deliminates the chance of damaging your headset or the interior of the aircraft. This product has been machined from 6061-T6 aluminum with stainless steel hardware for a lifetime of service. Mounts on 3/4” tubing