Review on 🐾 MaverickFlex Heavy Duty Weatherproof Dog Door with Sliding Lock Panel | Energy Efficient Aluminum Large Dog Door | Easy Installation | Magnetic Double Flaps | Ideal for Dogs Up to 220lbs by Cristabel Logan

This is the most secure and best made dog flap I have ever spoken of. Constructed of durable aluminum, an "inflexible plastic" that installs securely without rivets that intruders can't remove with a screwdriver, or less secure screws supplied by the manufacturer. It also features a precision machined, durable aluminum skid plate that CANNOT be easily removed from the outside, giving you peace of mind when you are away for long periods or on vacation. The dual valve makes it more energy efficient than standard single plate units. Very impressed with this precise, well constructed product.