The RAM-B-177-237 consists of a glare shield clamp base, short double socket arm and 1" diameter rubber ball, connected to a 1/4"-20 camera thread. This mount is designed to mount to the lip edge of a flat surface up to 5/8" thick. Popular mounting edges include a car side window edge lip or glare shield on an airplane. The base has two composite bolts that, when tightened, clamp the base to the lip surface. A RAM 1" diameter rubber ball is connected to the base allowing you to connect a RAM 1" diameter arm socket and connection plates to create the perfect mount for your application. The male thread matches most standard camera and camcorder female threads found on the bottom of the camera.