The RAM® Large Marine Electronics Mount with RAM® Hi-Torq Wrench (RAM-D-111-C-KNOB9H) is a complete, drill-down mounting solution for fish finders, chartplotters, and other large electronic devices. This kit consists of D size components, including a 3.68" diameter round base, short-length double socket arm, and 11" x 3" rectangular adapter plate. The base is pre-drilled with two holes at 180° and three holes at 120°. The plate has different combinations of pre-drilled holes which will match up to electronic devices and mounts such as marine GPSes, CB radios, ham radios, gimbal brackets, and more. This kit includes the RAM® Hi-Torq™ Wrench, designed to provide added leverage when tightening D size arms. This allows for a more secure hold and is especially helpful in cold weather when extra clamping force helps prevent ball slippage