Secure your large depth finder rock-solid on your boat with the Scotty 2.25" Ball System Arms, specially developed for the 2.25" Scotty ball system. This robust arm is made from high-quality UV-resistant nylon and stainless steel, ensuring an extremely sturdy and vibration-free mount for 10" to 12" fishfinders. Thanks to 360° rotation and 180° tilt, you can always adjust the screen with precision from any angle, then quickly and effortlessly lock the position with the convenient T-knob.