Just a momentary switch. I believe they are called normally on.

I Installed a Iron Age Killswitch on my EVH.. I'm happy with it. I went with the non led. I put in place of tone control.. just had to make cavity a bit bigger
https://ironageaccessories.com/collections/led-kill-switches
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Man, those are expensive. Just buy one of these (heck, you could buy 5 of these for that price) and it will even be delivered to your door in one day.