Introducing the new RAM Tough BallTM. Why call it tough Because this latest addition to the RAM product line has steel inside and out. The seamless transition between RAM versatility and steel durability allows for a multitude of real world, and out of this world, applications. With so many of the things we use incorporating threads and fasteners, there really is no limit to the number of uses you'll find for the RAM Tough BallTM. The RAP B 379U 252025 consists of a 1 inch diameter rubber ball, connected to a 14 in 20 X .25in male threaded post. The male thread matches most standard camera and camcorder female threads found on the bottom of the camera.