Gracely Products builds an extremely tough, chew resistant pet door which is popular with kennels because of the durability. They are known as the Stop Sign pet door because a red "STOP" becomes visible to the dog when the door is locked.

Generally, the only thing that ever requires replacement is occasionally the spring set.

The button at top center of the flap slides downward to engage the frame for locking.

Mounts on one side of the door or wall only, you finish the other side as you wish.

Installation
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