A notched and grooved, usually metal implement that is turned to open or close a lock. The oldest known lock was found by archeologists in the Khorsabad palace ruins near Nineveh. The lock was estimated to be 4,000 years old. It was a forerunner to a pin tumbler type of lock, and a common Egyptian lock for the time. This lock worked using a large wooden bolt to secure a door, which had a slot with several holes in its upper surface. The holes were filled with wooden pegs that prevented the bolt from being opened. In I857, James Sargent invented the world's first successful key-changeable combination lock. Yale invented the modern combination lock in 1862. A Phoenix locksmith can supply the key for your job...
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