Micro Rosette SWAP Bolt KitMicro Rosette SWAP Bolt Kit is a modular accessory mounting arm with a bolt on 1 4 20 and 3 8 16 screws on each end, allowing attachment of a wireless transmitter, monitor, audio receiver, and more to a camera. Install the bottom screw on your camera or cheeseplate and the top screw on your monitor or accessory, then link them together with a Micro Rosette Arm. SWAP Bolt design lets you switch between 1 4 20 and 3 8 16 with multiple 3mm locating pin