Cardas make the best connectors that I have seen. I use Lat International cable but the connectors aren't that great. Lat uses an RCA and many others do as well that that has a base metal, Zinc I think, with gold plating over it. Zinc is garbage as far as I am concerned. I switched to Cardas's top of the line connector which is real silver with a gold plating. They are a real pleasure to use. They aren't locking connectors but are better because the ground is spring loaded which means you still get a tight connection. They just push on and the spring keeps them tight. I've had problems with locking connectors . If the cable is in a tight location, they can'b be difficult to install. Also if you are not careful, you can damage your components if you don't loosen them enough upon removal.