Johnson / Cinch Connectivity Solutions 19mm Torque Wrench helps avoid over- or under-tightening that can damage or weaken connectors and systems. This 19mm torque wrench features a 3/4″ hex size and is used to tighten connectors between RF devices and systems precisely. At mmWave frequencies, proper tightening is essential to achieve the best performance. Johnson / Cinch Connectivity Solutions 19mm Torque Wrench meets IEEE P287 standards.