The 3/8" to 1/4" Anti-Twist Adaptor removes any possibility of the Titan Arm rotating out of the port when there are no ARRI accessory mounts and only 1/4" screw-holes available. The adaptor is designed to be used with the 3/8" Quick Release Bracket but can be used with any other accessory that uses the ARRI accessory mount to provide an anti-twist mount. Two 1/4"-20 screws with a 4mm Allen Key head is used to mount the adaptor into place. It is useful for smaller camera cages and cheese plates which only offer 1/4" screw-holes.