Haha. I don’t know, the way they described it just didn’t click. But it actually wasn’t that. It was just crazy stuck on there. Notice I said ‘was’. It is now back in my yoyo. Thanks to jhb for the links.
I basically just gripped the metal part of the tool with some pliers (not to tightly) and hammered a screw that was pointing into the multitool until it came out. It’s hard to describe clearly.