This is a much faster and more effective tool for opening Alps switches than my first attempt. Even very dirty switches, which are quite difficult to open using the toothpick method or my old switch opener, aren't a problem at all.
This model isn't that picky about print settings, but you'll want to use a 0.4mm or smaller nozzle to make the jaws as sharp as possible. It also has a print-in-place hinge, so you'll want your printer to be relatively dialed in otherwise you may not be able to free it up.
If you're familiar with how Alps switches are assembled then using this should be pretty self explanatory. I've also attached a few pictures to show what I mean.
Once you get the hang of using it, opening a switch should be about as fast and easy as pulling a keycap.
This tool kinda works with SKCL lock switches, but you need to give it some help. The slider on these switches is much thicker, meaning the tool can't close enough to fully spread apart the retaining tab opposite the slider track. If you can help pry that tab open with a toothpick while using this tool, then you should be able to get them apart. It's a bit tricky and isn't nearly as fast as taking apart regular Alps switches, but considering boards only have one or two locking switches it hasn't been enough of a problem to motivate me to design a dedicated tool just for them.
I've only used this with Alps and Matias switches, but as long as a clone switch has a similar retaining tab and slider geometry as a genuine Alps switch then it should work fine.
The author marked this model as their own original creation.