A lock lever is each of the metal plates inside a lever lock. Each one has a gate and a spring, and the teeth of the key lift them to exactly the right height so the bolt can pass. If a single lever sits too high or too low, the lock will not open.

The more levers a lock has, the more key combinations it allows. Even so, these locks can be manipulated through the keyhole, and if a key is lost the whole lock has to be replaced or re-levered, which is more work than changing a cylinder.

If your door has a lever lock and you have lost a key, consider converting it to a cylinder: next time, changing the cylinder will be enough. We explain it under lever to cylinder conversion and lock installation.

Questions that mention it

Is a lever lock secure?

Not very. The lever lock, the old one with the long key, is easy to open without its key. The advisable thing is to convert it to a European security cylinder. Read the full answer

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