You just can't beat Monoprices Prices and the products are very high quality. Thicker cables in comparison with the likes of Radio Shack or Best Buy etc. Products arrived to me fast and were well packaged so no shipping damages. I don't buy adaptors and rca cables etc local anymore.
So often RCA plugs need to have the outer connector "squeezed together" slightly to achieve a snug fit. This was not the case with these adapters, they fit perfectly! Highly recommend them if one needs M-M RCA-type adapters.
Like others here have mentioned, the connectors are just a little bit too big. They feel very loose and initially didn't give me a good connection. I pair of pliers took care of that and now they fit snug but I expected a little more from Monoprice. I wish they had these with the same type of connector as their "premium" RCA cables.
It would appear the outer (ground) barrel of these adapters is a little larger than spec I was getting awful buzzing noises on all the channels I used them on due to a poor ground connection. I removed them, used a pair of pliers to bend the barrels down smaller, and then re-connected them. This solved the problem.