The device has a shackle, a cable, or a spring loaded lever which extends out of the distal end of the handlebar whereby it can be used to retain such items as a motorcycle helmet or a flotation...http://www.google.com/patents/US6595031?utm_source=gb-gplus-sharePatent US6595031 - Retaining device for personal vehicle with handlebarsAdvanced Patent SearchPublication numberUS6595031 B2Publication ty