RAM Rail Clamp Ball Base for 51 to 64mm Rails (D Series 2.25" Ball)

RAM-D-271U-2 RAM® Rail Clamp Ball Base for 2 - 2.5" Rails Features Clamping base ideal for posts from 50.8mm to 63.5mm in diameter Included D size 2.25" RAM® rubber ball allows for connection to any D size RAM® double socket arm; ball and socket technology allows for near-infinite adj