Ram Mount Double Socket Swivel Arm for 1-Inch Ball Bases Consists of double 1" diameter open ball sockets with a 360 rotation point at the center The rubber ball and socket at either end, and a central pivot point provides unsurpassed adjustability The RAM ball sockets maximize ball coverage for optimal fit Dimensions: Overall Length: 6.25", Socket-To-Socket Length: 5.5" High Strength Composite