Ram Mount D Size 2.25" Ball Mount w/11" X 3" Rectangle Plate, 3.68" Round Plate and Hi-Torq Wrench [RAM-D-111-C-KNOB9H]D Size 2. 25" Ball Mount w 11" X 3" Rectangle Plate, 3. 68" Round Plate and Hi Torq Wrench The RAM D 111U C consists of a short double socket arm, 3. 68" diameter round base and 11" x 3" rectangular base. The round base contains pre drilled holes, including two holes at 180 degrees and three holes at 120 degrees. The rectangle base contains different combinations of pre drilled holes which will match up to many electronic devices and mounts, including