Anwenk Super Clamp w/ 1/4"-20 and 3/8"-16 Thread for Cameras, Lights, Umbrellas, Hooks, Shelves, Plate Glass, Cross Bars,Photo Accessories and More This super clamp is made of solid anti-rust stainless steel + black anodized aluminum alloy for high durability. Can mount virtually everywhere you need like cameras, lights, umbrellas, hooks, shelves, plate glass,cross bars, even other super clamps. Comes with 1/4"-20 and 3/8"-16 thread for setting up other configurations. Max open(approx.):2.16inches( 54mm); Total Length: 35"(89mm).Recommend clamp product 0.59"-1.25" max for tubing diameter. Net weight: 4.58oz. Note:This is not similar in size to the original Manfrotto Super Clamp. This clamp is smaller and designed only for light-weight applications.(Best weight load:0.5-2kg)