Professional locking type gold plated RCA phono connectors for large diameter audio cables. These heavy duty high-end RCA plugs are designed for systems where a perfect connection is required. The rotating outer barrel tightens the ground connection onto the RCA socket with a simple twist after insertion, ensuring it will not come loose. The gold plated plug has a large shielded solder bucket for the centre pin and a grub screw to tighten down onto the cable outer jacket ensuring a sturdy assembly. The split centre pin creates a perfect connection to all RCA sockets.