I purchased several of these couplers to connect RCA style audio cables. I assist in televising homeowners association meetings, and these are by far the best value. Very inexpensive. You'll spend much, much more at Radio Shack for the exact same thing. I also strongly suggest people visit monoprice.com before any other retail resource. You'll be amazed.
Beyond the fact that these were exactly what I needed and work well, they're a bit loose.
Even with the slightest pull, whatever cable I have plugged into these will come out (whereas the same connecter will fit quite snugly onto another jack). As such, I would suggest securing the connections with tape or something similar.
Even so, would buy again.
Pros: These are the same RCA jacks that we've been buying for years, and the same ones sold by the Shack. The price, however, is vastly less than the bloated prices the Shack charges.
Shop at Monoprice.