If you're tired of your fishfinder bouncing around on rough water, this RAM mount is what you need. It's made from marine-grade aluminum with a black powder coat that resists corrosion. You get a short double socket arm, a 3.68\ round base with a 2.25\ D ball, plus a 1.5\ x 4.5\ rectangular plate that fits Humminbird 8, 9, and 10 models. The round base has mounting holes at 180 and 120 degrees for flexible installation. What's cool is the rubber ball and socket tech – it absorbs shock and vibration, and lets you adjust your device to pretty much any angle. So whether you're in choppy seas or just want the perfect viewing position, this mount holds tight. It's built in the USA, comes with a lifetime warranty, and honestly feels solid in your hands. Great for boats, kayaks, or anywhere you need your electronics secure. Easy to install, stays put, and looks clean on your console.