1'' (25mm) ball adapter compatible with RAM mounts and any B size double socket arm 17mm ball adapter compatible with Garmin 17mm swivel ball GPS mount, phone holder etc. Can attaches to the back of 17mm phone magnetic plate/ clamp 【Wide Range of Applications】Interchangeable with several phone/tablet mounts to B size ball socket mouts. Suitable for various types of bicycles, motorcycles and other vehicles. 【Solid and Sturdy】Made of aluminum alloy, which is strong and durable, has a long service life, not easy to break like the plastic ones 【Precise Machined】Acurate dimension, with pattern on double balls, grip well, anti-slip This 25mm / 1 inch to 17mm Ball Adapter for RAM Mounts B Size Double Socket Arm, 17mm Swivel Ball Mounting Pattern GPS Mount is a must-have accessory for any outdoor enthusiast or GPS user. It is made of high-quality aluminum alloy, making it sturdy and durable. The adapter is compatible with RAM mounts and any B size double socket arm, allowing you to mount your device securely on your bike, motorcycle, or any other vehicle. The 17mm ball adapter is compatible with Garmin 17mm swivel ball mounting pattern GPS mount, making it easy to attach and remove your GPS device from your mount. The adapter is widely used on 17mm swivel ball mounting bike, motorcycle phone mount holder, navigation brackets, and other devices, providing you with a versatile and secure way to mount your devices.