Literally snapped on the first twist. All it is, is a socket wrench bit with a PLA handle attached. Inside the handle, the socket is connected using a small black nub. Because this was 3D printed with PLA, the tension from twisting directly aligned with the horizontal layers of the nub and sheared it. I'll continue to use the bit with an actual socket wrench, but this is not a quality product and it's likely you could find a 6mm socket for cheaper.