I made one for old 110 volt Unisaw.
Mounted a 20 amp wall switch in a box, mounted under fence rail facing down. Wood frame aaround the box and switch, with a flat wood slide, with a hole in it, fir the switch toggle.
Mounted a hinged wood paddle to push the slide, to shut off.
Has worked good for 10 +/- years.
Actually built it, because, I needed a paddle switch, that would turn off shop fan, when Unisaw came on. 15 amp. service!
Used 2 switches in a duplex box. 1 turned on as the other turned off.