There are 4 types of door swing movement as illustrated above. The door with inswing type requires user to push when opening a door and with outswing type, user needs to pull when opening a door. The direction of door swing is important before perform any Keylock 8800 installations. 
The Keylock 8800 fits perfectly with inswing door but for the ourswing door, the latch receiver must be the opposite of the handle side. For example, for right handle keylock, the left latch receiver is required.
The protruding surface lets the latch slide into its proper position into the holes in latch receiver.
Therefore, if you require Keylock 8800 for an outswing door, please mention “outswing door” in your purchase order for us to send you the correct latch receiver.
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