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The lock body is inserted into the door edge, the lever and escutcheon are installed on the surface of the door.
It is suitable for the outside door because of it is higher security. (Also adopt to inside door according to the actual condition) It is especially suitable for the handicapped. It can be classified by the latch function: single square bolt, single latch, double bolt, multi-bolt and key-operate latch with multi-bolt.
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