Lever
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Lever
A lever (or lever tumbler) is a lock design that uses flat pieces of metal (also known as levers) and a bolt as locking components. In most designs, the position of the levers prevents the bolt from retracting. When positioned properly, a slot cut in the lever allows the bolt to retract. Lever locks are historically one of the most popular lock designs, but use has dwindled as less expensive pin-tumbler locks gained popularity. Lever locks are popular in Europe (specifically the UK) as residential and commercial door locks and on safes. Safe-deposit boxes in banks around the world use lever designs almost exclusively.
History
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Principles of Operation
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Vulnerabilities
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