This is just what I was looking for to hook up my large portable generator to a 50 Amp Power Inlet Box that is then hard wired to a 50amp breaker on my main panel. Both ends plug in nicely, and it is about half the price of some others.
We used this to install the pigtail connection for our whole generator. The cord is sufficiently long, but the part that had to be connected/wired into another adapter was tough to bend/not as malleable as I would have preferred.
I needed a long cable to my house and my generator. The plug was on far side of house and the generator needed to be in the driveway. The cable was just what I needed.