Package Includes: 1x 1" to 17mm ball adapter, 1x 3.54" Double Socket Arm. Durable Construction for Demanding Use: Made from aluminum alloy with a rubber-coated ball. Provides excellent shock resistance, wear durability, and reliable stability even in harsh conditions. Wide 1" Ball Mount System Compatibility: Fits RAM B size 1" ball components. Ideal for connecting to 1" ball phone holders, perfect for setups on bicycles, cars, scooters, and more. Suitable for use in vehicles, aircraft, offices, or any scenario requiring a secure mount. Versatile 17mm Ball Socket Application: The 17mm (0.67") ball adapter is compatible with Garmin GPS mount 17mm socket systems. Also works with other 17mm ball-based mounts, including phone holders, tablet holders, and magnetic phone mounts. Full Adjustability & Secure Locking: The ball joint allows 360-degree rotation for optimal viewing angles. Simply tighten the knob on the Double Socket Arm to lock the position firmly in place. FPN 1" to 17mm Ball Adapter with Double Socket Arm, Compatible with RAM B Size Mounts, Suitable for Garmin GPS Mount and 17mm Swivel Ball Mounting Phone Holders