This bike rack holds two bikes, requires a standard hitch on your car. I preferred it as I found it easier to put my bikes on the back of my car rather struggling to get them up on the roof. It's also easier to lock your bikes up to this rack as well.
The rack locks onto the hitch, and the arms fold down when not in use.
I'm selling because I no longer have a car, so this isn't of much use to me anymore. Hope it finds a good home with active riders! :)