One of the mysteries of the English language finally explained.
A lock with the keyhole and tumbler mechanism contained in a cylinder.
- ‘Another common type of cylinder lock is the wafer-tumbler lock.’
- ‘The company announced yesterday that it's offering free product exchanges to customers concerned about the security of their tubular cylinder locks.’
- ‘When possible, ensure that key-in cylinder locks are protected by a guard to prevent removal.’
- ‘Inside a cylinder lock, there is a sort of puzzle, which only the correct key can solve.’
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