There is a spacer on the sliding-track accessory that gives a small gap between the PlexiDor and the security plate. The spacer is there to allow the flip lock to move freely, and should be left on.
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The Best Pet DoorMost pets hate flap doors! PlexiDor Pet Doors are long-lasting and beloved alternatives.
They have hinges, like a door, so there's no loud flap slap or flexible materials. They lock easily, and most models come with a steel security plate for additional security when you are away.
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