Think of these P3 switches from OTTO as mil-spec P1 switches without all of the bureaucracy. The have the same rolling seal and snap action contacts that guarantee good performance beyond their rated 1 million cycle rating. You will have this switch long enough that it may out live its original installation. Don't fret, specifying a switch with the threads on the front allows it to be easily removed from a panel without affecting its electrical connection! We use these with the optional switch guard as a fire extinguisher trigger. We wire these switches directly to starter solenoids. The short contact bounce time (under 5 ms) makes for a clean signal to every thing from radios to power distribution modules. We have used these in many mission critical applications and never once had an issue.