Super clamp's maximum opening: 49.5mmAnti-slip rubber pad attached, firmly grippedWith bigger-handle, effortless to lock or removeV-lock female mount quick release adapterEasy handy push-or-pull lever release designDirectly attaches itself to your camera battery The Universal V-Lock Female Quick Release Adapter is designed to directly accommodate your V lock battery, it features push-or-pull lever release design that allows to quickly attach or detach your camera batter, and a safety latch to prevent unexpected detachment. It comes with 1/4inch-20 mounting points on its back through which this V lock adapter can be firmly secured.The Super Clamp's jaw opening is up to 49.5mm. It can be widely used for DSLR, cameras, light stand, rods /poles, flashlights, hooks, shelves, bars, etc. It comes with anti-slip rubber pad that will help more firmly the item, and reduce scratch as well.Colour:blackMaterial:MetalPackage Contents:1 x Super Crab Gripper Clamp1 x V-Lock Female Quick Release AdapterOnly the above package content, other products are not included.Note: Light reflection 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.