Convenient Use & Humanized Design -- patented self-locking feature locks with one pull. Easy to handle, install and remove. Simple to lock and unlock with keys in seconds. It can be installed to the back of the steering wheel so it's not resting on top of the air bag. In order to facilitate the use of stretching, there is no need to use the key, and when the lock is idle, due to shaking will bring their own stretch, so we specially equipped with a Blue Magic Velcro fixed. Protect You and Your Vehicle all the time! -- Package With a Cap to avoid accidental damage to glass. A metal car safety escape tool to help prevent automotive entrapment and smash the window for safety escape. Your Life May Depend On This Car Hammer A+ Grade Anti-Theft Lock -- Made of high quality round steel and premium aluminum/alloy to Resists Prying, Sawing, Hammering. The Precise Double Spring Crescent Lock Sub-Type Encoding Key is specially designed to prevent professional thieves and mutual open rate! Our Lock will protect your vehicle with this robust physical and highly visual deterrent to car thieves and recommended by Policemen and Car Experts!