These can be hard to find in a pinch so it's good to be able to order them here. They seem to work fine.

This doesn't really apply to security systems but I thought you might be interested anyway. I run our Company's Technical Training Center that has a full electronic presentation system including LCD projectors, DVD players, a Digital Overhead machine, and lots more. Recently, we upgraded (replaced) the main unit and relocated it. There were tons of wires. These adaptors made adding the RCA patch cords to the original BNC connectors a breeze. Thanks.