Complete flat surface, drill-down mounting solution for the Humminbird Helix 7; RAM Mounts ball and socket technology allows for near-infinite adjustability Includes 2.5" round base with C size 1.5" rubber ball, medium length C size double socket arm, and a 1.5" x 3.5" rectangle base with C size 1.5" rubber ball that connects to your Humminbird Helix 7; hardware not included Made of power-coated, marine-grade aluminum for durability and reliability in the most demanding marine environments Backed by a lifetime warranty Compatible with Humminbird Helix 7