***** **********Best Quality Guranteed.
*****Max open: 2.4 inches.
*****Material: aluminum alloy. *****This super clamp are easy to install and quick remove. *****Mounts onto anything like cameras, lights, umbrellas, hooks, shelves, plate glass, cross bars, even other Super Clamps. *****Comes with 1/4" and 3/8"thread, can be mounted virtually anywhere.