Switches work perfect. It is difficult to tighten the threaded ring enough to hold switch in place without it jumping threads on the switch. The switch threads have a flat on two sides to allow keying the switch in a panel to prevent rotation. If you are like me.and probably ever other person using these.your panel holes will not be keyed since you just drilled them with a drill bit. Because there are two flats and the ring in softer plastic, it allows the ring to flex enough to jump threads.These also have the word HOTSYSTEM printed on the rocker of the switch. I'd prefer them not to have this.