RAM Flat Surface Drill Down 1.5" Ball Short Mount for Humminbird Helix 5

Attaches to flat horizontal or vertical surfaces* Features: 2.5" round base with re-drilled universal AMPS hole pattern and 1.5" rubber ball Short length double socket arm - Overall arm length: 3.56" A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection 1.5" x 3" plate with a four hole pattern and 1.5" rubber ball Plate thickness: 1/4" - center to center hole pattern is 1.5 x 2.5" (hole diameter: 1/4") RAM adjustable socket system for your perfect viewing angles Overall length fully extended: 5.225" Constructed of powder coated marine grade aluminum Holds up to 4 lbs. Made in the USA Compatible Devices: Humminbird   HELIX 5 DI HELIX 5 DI GPS HELIX 5 SI GPS HELIX 5 SI GPS KVD HELIX 5 SONAR GPS HELIX 5 SONAR HELIX 5 XD GPS Brand: RAM Mounts Part number: RAM-202-153-B-202U Warranty: Manufacturer's lifetime warranty * Mounting hardware not included.