These window locks are great for securing your window when you have a portable air conditioner window kit installed. They attach securely with screws into your window frame, so some installation is required.

Note that these window locks are not required for window kit installation- but they can provide some additional security. They allow you to "latch" your window shut with a window kit installed. They screw into your window sill, so semi-permanent installation is required.

One pack of two window locks is good for securing two windows.