The RAM-347U consists of a 1.5" diameter rubber ball connected at right angles to a 2" x 1.7"
rectangle base. The base has four pre-drilled holes at each corner, making the universal AMPs
RAM® Double Socket Arm
RAM® Double Socket Arm with RAM® Pin-Lock™ Security Knob
RAM® Twist-Lock™ Triple Suction Cup Ball Base
RAM® Round Plate with Ball
RAM® Tough-Claw™ Large Clamp Ball Base
RAM® Double U-Bolt Ball Base for 1" - 1.25" Rails