I have a like new condition lockable cat door. It has two pieces that you attach to a board or a door using screws. I do not have screws specifically designed for this item but I do have 4 wood screws if you need them, The door has a locking mechanism on the little knob handle that can keep the door closed if you say wanted to keep your cat in a specific areas. This would be cool if you had a catinary or a house where you could cut out holes in the door for your cat to move around in.