Switchable magnets

I’ve recently discovered magswitches. These are magnets you can turn off and on. I use them in my workshop to hold down fences, stops, and featherboards. When they are turned on, you can’t move them. When off, they lift off instantly. They are non-electronic; the switch is an ingenious mechanical contraption hidden inside a very tiny case. You can buy fixtures with magswitches built in, or you can buy the switches to make your own devices. I found that even a single magswitch alone, such as the small MagJig 95 ($26), is a useful stop in the workshop because you can position it anywhere quickly on a metal surface and have it instantly hold. — KK