Rokform – Universal 1” Ball Adapter Motorcycle Phone Mount, Safely Secures Any Twist Lock Case with Aluminum Lever Lock, Phone Holder Bike Mount (Black)

Have a clamp fitting for handle bars so this adaptor works well to mouth the phone to other bikes

Not used this adapter yet but it looks up to the job of fixing a phone to a motorcycle

It’s similar to quad lock but better quality and in my opinion better service.

Wanted this so that I could use existing Quad-Lock female fixtures. The Rokform male fitting is smaller than the quad-lock mount, so won't lock into place; the phone just falls off the mounting. It does seem to be better-made than the Quad-Lock equivalent, though, so would probably be very good with a full Rokform setup.