Review on Gebildet Latcting Lockable Trumpet Doorbell by Brian Cheney

Nice little switch. easy to install in a round hole. Stable attachment with enclosed lock nut. I used them to add a mute switch to a guitar balun box. They work great. When you take the box to connect the guitar, take the switch and it will turn off automatically. When you lower the box, the switch is released and turns on the device. The beauty is that these switches are not latched in the conducting position.