Qty 1 piece(s) per pack Color Black Material Aluminum alloy Socket Size Standard hot shoe adapter or 1/4" screw connector " Max Load 2 kg Max Height Fixed cm Min Height Fixed cm Other Features Durable aluminum alloy utilizes lever principle can be install on column aspect plate cut and irregular shape surface; There is anti-slip rubber built-in the clamp mesh adopts screw Stepping control to fasten or open fastness and stability; There are 1/4" and 3/8" screw threaded holes to stall other devices such as camera flash lamp and other devices Packing List 1 x Crab clamp 1 x Hot shoe adapter 1 x Adapter screw