Thank you for sharing your review. We're sorry to hear that the door hasn't met your expectations.
We include nylon screws for installing the door because metal screws may strip the plastic door frame frame, and nylon screws are easier to cut to size. However, if you're careful, you can switch out to metal screws if you prefer.
If you need any assistance with training your pets to use the door, please feel free to reach out to us at 1-800-732-2677, and we'll be happy to help!