The Scotty 1.5" Ball System Top Plate is a versatile and durable mounting system designed for 7-9" (17.8-22.9cm) fishfinders. It features 1.5" (3.8cm) ball joints and a 2.25" (5.7cm) square fixed base, compatible with most popular electronics brands. Its UV-resistant, engineering-grade nylon construction and corrosion-resistant stainless steel mounts provide excellent resistance to extreme conditions. The top plate offers 360˚ rotation and 180˚ tilt at both ends, while the easy-to-handle T-button allows quick release or tightening. Designed for ¼" (0.6cm) mounts, sold separately, this system keeps your device secure and stable.