The RAM-101AU-B, powder coated marine grade aluminum mount, consists of a SHORT double socket arm mount, one round 2.5" diameter base with the universal AMPS hole pattern and round base with a 1/4"-20 threaded steel stud. 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.