This door lock incorporates a double dead bolt and indicator mechanism.
The lock may be operated freely by handle.
When you turn the thumb turn up to 90 from the inside, the Red indicator will appear on the outside to indicate engagement of the lock.
The door can’t be opened by handle except with the key.
Change toward method: open the back cover, turn over the bolt.
Suitable for bathroom door with 38-48mm thickness.
Product Code: MC4
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