The TWIST Mount EVF Knuckle with ARRI 1/4"-20 Screw from MID49 helps you construct an EVF mount best suited for your specific camera configuration using separately available modular components. This knuckle component features a NATO rail clamp and a 15mm rod port with a variable friction design so you can adjust your monitor without needing to loosen the thumbscrew. This version also includes an ARRI 1/4"-20 screw compatible with select monitors.