This super clamp is universal that can fix onto any shaped body like cameras, lights, umbrellas, hooks, shelves, plate glass, bars,etc. Super Clamp Comes with standard 1/4 inch-20 and 3/8 inch-16 thread. Can be mounted virtually anywhere. Non-slip rubbers on the inner side provides strength and stability. Maximum opening diameter: 50mm. Perfect for clamping items 0.6 inch-1.73 inch in diameter. Strong construction.This Super Clamp is made of Aluminum Alloy.Net weight: 4.6oz. .Best Weight Load: 0.5-2.5kg. 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. Color: silver + black Package Contents: 2pcs * Crab Clamp Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.