"The RAM-202AU consists of a 1.5"" rubber ball that is connected to a 2.5"" diameter round base. Also, included is a 1/4""-20 threaded steel stud, centered, the round base provides support and stability for cameras that rest on top of it. The male 1/4""-20 threaded steel stud will connect to any standard female thread found on camcorders and digital cameras."