Universal clamp with 1/4inch-20 and 3/8inch-16 Threaded Holes and locating hole on the top. Mount on cold shoe, camera cage or standard rail to attach video monitor, microphone, video LED light or wireless receiver via articulating magic arm, monitor support ball and so on. Pull-out design, pull out for 360 Degree Adjustment, Keep the device from blocking the locking handle and lock easily. clamp body top with rail design, support quick mount other device via another clamp and don't need to remove the previous clamp. Colour:Black Material:Aluminum alloy Package Contents: 1x Clamp Only 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.