I bought this to replace a failed plug on a David Clark headset. Overall the new plug is OK. There were no instructions for wiring it, so I disassembled the old plug and used an ohm meter to map the 3 wires. The ground lead on the new plug was somewhat difficult to solder. I used heat shrink material as a strain relief. The crimp to hold the wire in place is weak, so after verifying the plug worked I filled it with black RTV to prevent wires from breaking or pulling out. Hopefully this will last awhile.