R12 Schrader Valves

They are supposed to be one piece and simply unscrew and come out. There are various "broken valve remval tools"

[URL]https://www.google.com/search?...SAQMwLjSYAQCgAQHIAQjAAQE&sclient=gws-wiz-serp[/URL]

So these are just normal Schrader valves? I drove right by my auto AC place today and never thought about stopping and asking him...