Keep your expensive helmet from falling off the bike, ruining it or ruining the visor. Hanging it on the mirror could impact the liner and lose its protection properties (according to Helmet Manufacturers). Fits most bikes that have Bar Ends or Hand Guards AND, fits ALL types of helmet straps and fasteners. D rings, quick connectors, ratcheting straps, etc. Helmet can also be long with the padlock (available from us as it is hard to find a suitable padlock). See also our other products for a locking jacket/helmet cable to secure the rest of your equipment. The position of the Helmet Hook is IDEAL. Its at the furthermost point from the bike