Just received the jackpot of free kegging equipment from my home brewing mentor: 10 pin locks, dual gauge regulator, and a ton of fittings. I now have 13 kegs! Guess I'll have to get to work on that pipeline. Anyhow, amongst the fittings I noticed one set of these which seem to be low profile pin-lock connectors, which I've never seen before. Has anyone else seen these? I'd like to buy another set for an upcoming mini fridge kegerator project.