Aviation Helmet Round Mount / Quick Release Version / Boom Guide Ratchet (Knurl Knob)

This helicopter helmet Round Mount, also referred to as a "Knurl knob", is used to attach wire or the flex boom to a series of Helicopter Helmets.  Will fit all helmets. This is the Quick Release version which has a lower profile and twists off the mount for fast replacement of your boom.  This is the perfect boom mount when your using two different mics on the same helmet.