Manufacturer Description The RAM-D-111-C RAM Mount Marine Grade Aluminum Mount, with Short Arm and Screw Down Base, consists of the 2.25 inch diameter ball and socket system with RAM Universal Rectangular 11 x 3 inch Plate. This mount is designed to be a universal mounting solution for large and heavy electronic devices, including large Marine GPS. The hole pattern found on the rectangular plate will connect to a large variety of third party cradle, gimbal brackets and mounts. Rectangular Universal Mount End Plate Design:The RAM-D-111B RAM Mount Marine Grade Aluminum Universal Rectangular Plate has a 2.25 inch diameter rubber ball connected at right angles to a 11 x 3 inch plate. The plate has some pre-drilled holes which may match up to your electronic devices and mounts, or you can drill new holes of your own. Rectangular Universal Mount Arm Design:The RAM-D-201-C RAM Mount Dual Socket Short Arm is a 2.25 inch D size Ball Socket Arm made of Marine Grade Aluminum. The arm is 3.63 inches long between socket centers and is finished with a Black Powder Coating. The side of the arm includes a tightening knob which allows you to open and close the socket ends. Rectangular Universal Mount Base Design:The RAM-D-202 RAM Mount Marine Grade Aluminum Screw Down Plate has a 2.25 inch diameter Rubber Ball connected at right angles to a 3.68 inch diameter Plate. The plate has pre-drilled holes in the base plate, including two holes at 180 degrees and three holes at 120 degrees. Note: Mounting hardware is NOT included with the purchase of the RAM-D-202.Features and TipsHere is a list of Rectangular Plate Short Arm Round Base Mount 2.25 Ball features, along with a few user tips.Warranty: Manufacturer's Life Time WarrantyCradle Design: Rectangular Plate to connect large and heavy electronics including Marine GPSCradle Material: Black Powder Coated Marine Grade Aluminum PlateMount Material: Black Powder Coated Marine Grade AluminumMount Ball Size: RAM 2.25 inch Solid Rubber BallPivot Point Design: RAM Patented RAM 2.25 inch Rubber Ball and Socket JointArm Type: RAM Arm with Dual 2.25 inch SocketsArm Length: Short length of 3.63 inches between socket centersBase Type: Round 3.68 inch diameter Plate design to be bolted to a flat surface