Combination design - Designed for kayak and SUP anglers needing an easy way to install the fishfinder screen and radar at the same time. The 1.5” ball design gives you a much greater clamping force for larger accessories while still having a smooth full range of motion. Has a few options of screw hole patterns to fit various fish finders (screws not included). Incredibly durable design - Made of High-performance composite materials for durability and reliability in the most demanding marine environments. Complete flat surface and drill-down mounting solution make it possible to maintain the structure of the mount out on harsh waters. Compatible with Garmin: Striker 4, Striker Plus 4, Striker Vivid 4cv, Striker Plus 4cv, ECHOMAP Plus 43cv, ECHOMAP Plus 44cv, other Fishfinders and GPS Chartplotters. Compatible with Lowrance: Elite 3x, Elite 4, Elite 4x, Elite 5, Elite 5x, Hook Reveal 5, Hook 2, Hook 4, Hook 5, other Fishfinders and GPS Chartplotters. Compatible with Humminbird: Helix 5, Piranha Max 4Di, other Fishfinders and GPS Chartplotters..