This mounts an 110V Single Phase On/Off Ortis Router Table Switch to either a flattop, or a bar mount using M5 hardware. The bar mount is made to fit a 1.25" bar, like those found on Husky branded tool carts. Mine is setup to be the E-stop for a table top router.

This was specifically made to fit this On/Off button, found on Amazon:
https://www.amazon.com/Single-Ortis-Contact-Electrical-Equipment/dp/B08PY8B8CZ