iBOLT 25mm / 1 inch to 17mm Composite Ball Adapter for Industry Standard Dual Ball Socket mounting arms- Works with All Industry Standard B Size/ 1 inch / 25mm and Garmin GPS 17mm Brackets

It’s exactly what I need and it fit well.

Fits Garmin GPS and adapts to RAM mount

I added this to a Ram Mount rod along with a clamp to the back of my motorcycle. Because of this step down from 1" to 17mm I can use my GoPro and 360 cameras to record my rides.

Good quality and strong

I got this because the suction cup that comes with the iOttie phone mount becomes loose after a couple of months. This allows you to use standard RAM or cheap RAM-knockoff systems while still enjoying the small, lightweight, auto-grasping and wireless charging iOttie cradle.The 17mm ball end doesn't support a wide range of motion, but that's not the fault of this adapter, it's just the way iOttie designed their cradle -- and that's fine since the rest of your RAM system is of course very adjustable.I've had no problems with this slipping and losing adjustment, even in my bumpy Jeep.