If you’re thinking of installing a doggie door or cat flap, think of installing LockLatch™ instead
Here’s why:
LockLatch™ is less expensive
And fits any door, window or hatch whatever it’s made of and whichever way it opens. Even glass sliding and patio doors.
LockLatch™ is less destructive to your existing door because you don’t need to cut a hole. So LockLatch™ could be a very good option if you’re renting.