What's Included: This mounting kit contains 1 x 1" ball Square Plate base, 1 x 3.54" Medium double socket arm, 8 x M4 screws, and 4 x wall anchors. Durable & Sturdy Construction: Built to endure, this mount features a double socket arm and Square Plate base crafted from high-quality aluminum alloy, delivering superior stability and long-lasting durability. The 1" rubber-coated ball adds anti-slip grip and shock absorption, while the robust design withstands harsh conditions—from off-road vibrations to extreme weather—ensuring reliable performance ride after ride. Wide Compatibility: Engineered to seamlessly integrate with all standard 1" ball accessories, this base acts as the core of your mounting system. It's perfect for supporting phones, tablets, action cameras, fish finders, GPS plotters, navigation units, radios, and various Garmin/Lowrance/Humminbird/Raymarine electronics. Fully compatible with RAM B-size mounts—just attach your favorite 1" ball devices and go! 360° Adjustable Ball Head: Enjoy total flexibility with the rubber-coated ball joint, which allows smooth 360° rotation and multi-angle positioning. Simply tighten the locking knob to securely fix your device at your preferred viewing angle—no wobbling, no slipping, just rock-solid stability for clear visibility. Secure AMPS Drill Base with 4-Hole Pattern: Featuring the industry-standard AMPS hole pattern, this base offers broad compatibility with popular mounting systems and devices. Pre-drilled holes enable super stable, hassle-free installation on dashboards, walls, or desks. Ideal for use in boats, kayaks, semi-trailers, cars, trucks, treadmills, and off-road vehicles. (Note: Professional consultation is advised for vehicle installation to avoid sensitive areas.) FPN Medium Double Socket Arm with 1" Ball AMPS 4-Hole Square Plate Base, Aluminum Alloy Arm&Drill Base, Compatible with RAM Mounts 1" Ball Components, for Car Truck Boat