Mounted this on a flat deck boat surface to hold a 10-inch Humminbird, and it’s handled both calm water and moderate chop without shaking the screen loose. The dual-joint arm gives you more range and finer control than typical ball mounts, especially when you need to swing or tilt the screen quickly based on glare or seating position.
Installation was easy, and the build quality is solid, full-cast marine-grade aluminum with a powder coat that’s held up well against saltwater. So far, I’ve not noticed any flaking or rust, and the included mounting hardware has stayed tight. Adjustment knobs give good tension without needing to over-crank them, and the pre-drilled base plate with screws and bolts matched up with my bracket without modification.
Review from M