Check the listing for details. RAM-S-D-111U RAM Pin-Lock Marine Electronic Mount - D Size.... Color: Black, Condition: New. Listed at 171.49 USD. RAM Pin-Lock Marine Electronic Mount - D Size... RAM-S-D-111U Genuine RAM Products! The RAM-S-D-111 consists of a 3.68 INCHES diameter round base, STANDARD LENGTH double socket arm, 11 INCHES x 3 INCHES rectangular base, RAM mixed combination Pin-Lock security nut and key knob. 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 Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more. RAM Pin-Lock security solutions are designed to withstand the harshest environments where RAM Mounts are commonly used. With an emphasis on aesthetics and function, RAM security nuts/knobs are low profile and only add a small amount of additional bulk to your system when compared to the standard knob included. At a fraction of the cost of currently available keyed locking knobs, the additional peace of mind and tamper resistance comes at a very affordable price.hardware included (1) RAM Pin-Lock Security Key(4) .312 INCHES x .187 INCHES Shoulder Washersproduct dimensions Overall Height: 11.5 INCHES socket to socket length 6.88 INCHES hole pattern See Drawingsplate size Top Plate: 3 INCHES x 11 INCHES Bottom Plate: 3.68 INCHES Diameterball size D Size (2.25 INCHES )weight capacity Standard Use: 6 lbsHeavy-Duty Use: 5 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 4.47 lb Additional Information The 11 INCHES x 3 INCHES 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. hardware included (1) RAM Pin-Lock Security Key(4) .312 INCHES x .187 INCHES Shoulder Washers product dimensions Overall Height: 11.5 INCHES socket to socket length 6.88 INCHES hole pattern See Drawings plate size Top Plate: 3 INCHES x 11 INCHES Bottom Plate: 3.68 INCHES Diameter ball size D Size (2.25 INCHES ) weight capacity Standard Use: 6 lbsHeavy-Duty Use: 5 lbs materials Marine-grade aluminum packaging type Poly Bag Weight 4.47 lb