I used it to build a custom-made instrument using internal balanced microphones. The length of the screw was hardly long enough to mount it through my 5mm thick plywood (the nut is only scewed half-way), but its ok.
It's made of plastic but it's not so cheap plastic that it would melt during welding, as some low-quality plugs sometimes do.
The plugging and unplugging of the jacks feels just like it should.
Just fine for the price.