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The front drawer locks:

It can use a locks control two, or three drawers. Installed on the front of the office (as shown in the left picture).

The side drawer lock:

It can use a locks control two, or three drawers. Installed on the side of the office

The tongue lock

It is generally only a drawer lock, right in the middle of it in a drawer, can only lock a drawer. (pictured at right)

Drawer lock with latch bolt

After the key off, just push the drawer to lock. Easy to use