Installing a cat flap onto the door will allow your pet to come or go whenever it wants. Follow the steps below to find out how to trace the shape, cut it with a jigsaw/hole saw and install your cat's flap. If your cat flap has a manual 4-Way lock https://window-with-cat-flap34384.blogchaat.com/30737887/back-door-with-cat-flap-fitted