The Classic Dog Door has a Heavy Duty aluminum frame built to withstand the stress from even the most powerful breeds.
 

Wouldn't it be great if your dog could open doors?

He could go in and outdoors when he pleases (unless you don't want him to, in which case you can close it with the closing panel). If you have to be away from the house for many hours, your dog can now have access to the yard when he wants. The unique flap system will keep it weather tight. Now your pet can come and go as it pleases.

Freedom and convenience for you and for your dog.