1. With a 1/4 screw hole, it can be used with various selfie sticks, gimbals, mounts, etc.
2. The width is adjustable and can be applied to most sizes of mobile phones, including iPhone pro max.
3. For phone sizes of 4 inches to 5.5 inches max.
Note: If you need to match the two-jaw adapter, you can check it here>> 1/4 Adapter for Action Cameras