Securely mount your smartphone with the Mobile Phone Clamp with Dovetail Jaw from Really Right Stuff. This mount fits devices 2.2 to 3.4' wide and has two 1/4'-20 standard threaded holes for mounting on tripods, monopods, and more. The mount adjusts using a knob and a custom hex key that is secured within the clamp with a pair of rare earth magnets while a knob locks the phone in place. Angled jaws hold your device in place and are lined with firm rubber. The 1.5 quick release dovetail jaw lets you directly mount your device to compatible ball heads and other devices.