Heavy Duty: Extra strong load-bearing marine electronic mount is made of all aluminium alloy and can hold up to 15.5 lbs. static and 4.5 lbs. dynamic. Remains strong and stable under the impact of waves. Securely holds 9"/"10"/12" screens Dual Purpose Plates: Rectangular and round plates contains different combinations of pre-drilled holes that fit various devices including Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more. AMPS hole pattern is ideal for direct installation on boats, kayaks, or any flat surface 360° Rotation: Features ball-and-socket technology to ensure a secure grip and allow for 360-degree rotation and ±90° tilt. Easily find the perfect viewing angle for your device, ensuring optimal visibility while on the water Sturdy & Durable: The round base & rectangle plate made of ADC-12 aluminum alloy material with CNC machining and iii grade hard anodized surface. The long double socket arm made of powder-coated, ADC-12 aluminum alloy for durability and reliability in the most demanding marine environments Ideal for use as marine electronic device mounts for mounting fish finders, GPS chartplotters, depth finders, navigation, radios, etc. Compatible with Garmin, Lowrance, Humminbird & Raymarine fish finders and GPS chartplotters Important Note: Not compatible with Lowrance Hook Reveal 5,garmin 106sv, Humminbird Helix 5/7/8/9/10/12/15 and Solix 10.Please confirm your device model before purchase Aluminum Alloy Fish Finder Mount with C Size 1.5" Ball, Dual Purpose Rectangle Plate & Round Base, 6.7" Long Arm Marine Electronic Mount Compatible with Garmin, Lowrance, Humminbird, and More