ユニバーサルボールマウントスマホホルダーアダプター

The ball mount locks into my case with a satisfying click, and it holds my phone rock-solid through bumpy roads. Took less than a minute to install onto my existing arm.

Swapped out my old mount for this ball adapter and it clicks in so securely I don't worry about bumps anymore. The universal fit means it works with any of the Rokform cases I already had around.

Took a chance on this since I already had the compatible case, and the adapter fits the ball perfectly with zero wobble. Swapping it between my car and desk mount takes about five seconds, which is exactly what I needed.