Super Clamp is made of solid anti-russtainless steel and lightweight aluminum alloy with black anodized treatment for higher durability. This mini super clamp can be connected to any small size shaped body like 15mm rods,cameras, lights, umbrellas, hooks, shelves, plate glass, cross bars, even other Super Clamps. The super clamp comes with universal 1/4"-20 and 3/8"-16 thread which allow more setups such as fix a ball head on it to connect your led light,action camera,microphone. And there are more setup choices to install your camera photo accessories. This Super Clamp can is with Max open(approx.):2.16inches. Suggest mounting shape/tube items with size 0.6"-1.73" in diameter. Note: This is not an original Manfroto super clamp but a super clamp in a smaller size. It functions very well and can hold heavy weight configurations. Package includes 2x Super Clamp