I primarily use this TRS jack for TRS->XRLm adapter cables. Many mixers give a balanced signal in the form of a TRS for the AUXs or other outputs, such as a matrix.
These are good value, solid construction. Very useful. I gave only 4 stars because they only have a crimp type cable restraint. There are other types that have better cable restraints. This one is fine for most conditions. I now only get NYS 228, a much better choice, better quality!