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No lock is 100 percent foolproof, but the door lock you choose depends on what you want to secure. A latchbolt or deadbolt is a good choice for a door that already has a locking door knob for additional …

The meaning of LOCK is a fastening (as for a door) operated by a key or a combination. How to use lock in a sentence.

Replace or cut new keys for padlocks, enclosures, cabinet doors, and locksets.

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