Review on StarTech.com GC98FF Black DB9 to RJ45 Modular Adapter - Serial Adapter for Female DB-9 to Female RJ-45 by Owen Phi

Good for its purpose but due to the plastic case overlapping the metal connection it didn't fit close enough to some of the connectors to be secured. I had to buy an adapter cable to plug it in between as the TV I needed to connect to also had a plastic housing next to the plug that prevented it from screwing into its pins because it wasn't close enough. Overall, however, the contacts and build quality are good.