http://www.totalsecurityservices.com/ "...As recent events demonstrated, increased safety devices are needed to protect our pilots, children, teachers, managers, doctors, and government employees. The Insta-Brace™ is a secure, low cost, low visibility, and highly effective tool which provides a true physical barrier to attackers. At the first sign of trouble, only the Insta-Brace, with its stainless steel, aircraft strength cable and unique "occupant key," preserves people from harm until help arrives..." Remember to plan ahead,plenty of ammo,plenty of water.