1/4″-20 & 3/8″-16 Captive Tie-Down Screw Mounting Insert with Locating Pin Rubberized Anti-Twist Surface Slotted Screw Channel Keep handy as a spare or mount a second camera onto thisQR-CINE-S Quick Release Plate for AirHed Cine-S 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 of the plate 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 mounting insert with a spring-loaded locating pin and 1/4″-20 threaded holes, and it rides in 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 itself within your tripod head’s platform to find the optimal balance for your camera rig. A shorter slotted channel accommodates the included 3/8″-16 captive tie-down screw.