https://telegra.ph/Fitting-a-Cat-Flap-11-06-5
https://bentsen-trevino.blogbr....ight.net/cat-flap-in
Installing a pet flap on your French or Patio doors is a good idea if you have a dog or cat. It allows them to enter and exit without you needing to open the door. There are for cat flaps designed to fit uPVC composite or wooden doors. Some come with a four-way locking system which can be set for exit only, in-only, or open. Installation Cat flaps are a great way to let your cat in and out of your home without opening the front door