The RAM-SG-111U consists of a 2.5" diameter round base, STANDARD LENGTH double socket arm, 6.25" x 2" rectangle base, RAM mixed combination Pin-Lock™ security nut/knob and key knobs for Gimbal Brackets. The 6.25" x 2" rectangle base is a universal mounting bracket with a selection of mounting hole locations. In certain applications additional holes may need to be drilled for proper fit with your electronic device.