These locks are used to increase the security of the building and are known as auxiliary locks. The advantage of auxiliary locks is that however the robber can open the main lock, the auxiliary lock is hardly to open and takes a long time for the robber to open it, so increases the security of your home. Auxiliary locks can also be used as snib lever. Since this lock operates separately from the down lock, it requires a cylinder to use.
Forehead is made with iron material and plating.
Latch bolt and axel are made with brass material.
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