RAM® Square Post Clamp Base for Posts up to 1.5" Wide – RAM Mounts
RAM Mount Ram-Tube Fishing Rod Holder with 2" X 3" Square Base
Amazon.com: RAM MOUNTS (RAM-101U-B-2461 1.5" Diameter Ball Mount with Short Double Socket Arm, 2.5" Round Base (Amps Hole Pattern) and 3.625" Square Base (Vesa 75 mm X 75 mm Hole Pattern) :
RAM Mount Radio Belt Clip Bar Lift Truck Clamp Base
RAM Mount Square 2 inch Rail Clamp Base with 1.5 inch Ball
Ram Mounts RAM 2 in. x 1.7 in. Base with 1 in. Ball for Garmin Zumo, TomTom Rider and Urban Rider - RAM-B-347U Dirt Bike Motorcycle Goldwing Snowmobile - Dennis Kirk
RAM Mount Square Post Clamp Base 2.5" Wide w/1.5"Ball [RAM-247U-25]