The phot r super clamp with ratchet handle is a versatile grip tool made of lightweight cast alloy the clamp can hold a wide variety of items such as cameras lights umbrellas hooks shelves plate glass cross bars even other super clamps the super clamp can be securely mounted on any tube or pipe from 05 to 21 and is supplied with a wedge insert for clamping onto flat surfaces the ratchet handle allows you to disengage it and tighten it down from any angle a very handy feature when