The C clamp can be clamped onto objects such as table edges, plates, glasses, crossbars, and more up to 1.65" in thickness. It features extended neck for deep grip. In addition to featuring vinyl sleeves that protect the surface you are clamping to from marring, the C clamp provides muliple 1/4"-20 and 3/8"-16 threaded holes for mounting a lightweight camera, light, monitor or other gear.