Arca-Swiss Compatible 1/4″-20 & 3/8″-16 Captive Tie-Down Screw Rubberized Anti-Twist Surface Slotted Screw Channel Keep handy as a spare or mount a second camera onto this Arca-Swiss compatible QR-CINE-A Quick Release Plate for AirHed Cine-A from 3 Legged Thing for fast swapping of cameras on your tripod head. Made from an orange anodized magnesium alloy, the plate is lightweight and strong enough to stand up to the rigors of a production day. The rubberized patches on top provide increased grip while protecting your camera from metal-to-metal contact for a good grip without overtightening the tie-down screw. The plate has a slotted channel that allows you to adjust the position of the tie-down screw and your camera to rough in the balance, and you can slide the plate within your tripod head’s platform to find the optimal balance for your camera rig. The included 1/4″-20 and 3/8″-16 stainless steel captive tie-down screws stay in the channel when no camera is attached, making it less likely they will get lost when moving from location to location.