By admin on February 8, 2010
Every people want a safety for something that they thing is very important to secured. In United State, the system of security appeared in 1928. This security system is found by H.R. Simpson. He calls the first term with rapping or bump-key. Bump Key Sets becomes very familiar in United State. The reason is that the bump-key is easy to lock quickly. Moreover, it has pin that can directly jump to the cylinder, later it can slide freely. Bump-key is a simple and fast technique in locking. Yet, in 2002-2003 this security technique find a trouble …
Posted in Technology | Tagged Bump Key
