PULUZ Multi-function Magic Arm Ball Mount Clamp Crab Pliers Clip(Red) Crab Pliers Clamp 1. Super crab clamp is made of solid anti-rust aluminum alloy for high durability. Non-slip rubbers on the inner side provide strength and stability. 2. It has a female 14 inch and a 38 inch, both the standard fitting sizes in the photo industry for heads and tripods can be used for a variety of attachments. 3. If equipped with a magic arm, they will be able to connect to a monitor, a LED video light, flash light and others. 4. Widely adjustment range: Open: 38mm; Recommend clamp product: 13mm-30mm in diameter. Magic Arm Ball Mount Clamp 1. Multi-functional: The dual ballhead can be mounted directly to a DSLR or camcorder shoe mount, to provide good photography studio shooting and shake-free stability. 2. Double ballhead: With a cold shoe adapter and a 14-inch screw,the universal ballhead allows for the attachment of a full array of video accessories to your camera while shooting video. 3. Security lock knob the double ballhead can be instantly locked off in any position for fast and safe operation;With 180 degree swivel articulation for easy direction.