Micro Rosette to TWIST MountThe Micro Rosette to TWIST Mount is one part of a modular accessory arm with a quick release spud clamping, allowing attachment of a wireless transmitter, monitor, audio receiver, and more to a camera. Clamps have a variable friction design, so you can grab and twist the arm or accessory without loosening a thumbscrew. Micro Rosette to TWIST Mount (Hole) is the version with a 1 4 20 threaded hole. Micro Rosette to TWIST Mount (Screw) is the version