"If there's one thing inexperienced anglers forget when buying a GPS or chartplotter, it's how they'll hold it. Seasoned anglers know they need a sturdy, convenient mount like the RAM Mounts Ball Mount with Round Base for Humminbird Helix 9, 10, 12, 9 G2N, 10 G2N, 12 G2N, Solix 12, and Solix 15 units. Perfect for several Helix and Solix models, this GPS mount features a double-socket arm mount with a round 3.68""-dia. base with universal AMPS hole pattern and a 5""L x 2""W rectangular basecombined. Translation: they're perfect for mounting Humminbird units for unbeatable hold with elegant precision adjustability. Rubber-ball socket technology dampens shock and vibration unlike ordinary mounts that just screw in or clamp and stand too stiff. The ball socket in the RAM Mounts Ball Mount with Round Base allows for near-infinite adjustments for a perfect viewing angle. Double-socket arm mount Unbeatable hold and precision adjustability Rubber-ball socket technology to dampen shock and vibration Near-infinite adjustments Lets you pick the perfect viewing angle Securely and elegantly holds Helix 9, 10, 12, 9 G2N, 10 G2N, 12 G2N, Solix 12, and Solix 15 View the RAM Mounts Kayak and Boat Compatibility Chart."