The Cornfield Double Monitor Deck Mount is the best on the market today. This heavy duty double mount is the best on the market today with many adjustments to fine tune your setup.Made of high strength 6061 aircraft aluminumThe depth finder mounts are tapped for Humminbird, Garmin and Lowrance (WILL NOT FIT HELIX 7 model) Helix 7 adaptor plate sold separatelyWill handle 7 to 16 wide depth finders13' center plateStandard allen wrenches requiredDeck mounting hardware not included