twtade / 2pcs 22mm 2 no 3 - positions maintained latching rotary select selector switch 440v 10a (quality assurance for 3 years) xb2-20x/31 twtade special note: this selector switch, must be fixed to use on the panel. 22mm panel cutout diameter, self-locking action. used widely to control the electromagnetic starter, contactor, relay and other automatic control electric circuits.