Ah okay. My claim was based on using my friend's Leatherman, and when you mention swinging it open I'm assuming my friend's was rusted or poorly maintained otherwise, because there was no swinging to be swung on that thing, more like wrenching to be wrenched.
Fun story the one time I thought I had killed myself on WD-40 it was trying to fix a friend's offbeat Leatherman that he had let rust into a very sorry state. For everyone who tells me not to use WD-40 on rust, yeah, okay, I know now guys. But did YOU know they have a national hotlife for WD-40 safety?
If my mom ever asks if I've ever gained anything from wasting time online, I'm finally prepared. That said, I respect your bravery in using WD-40 in the first place. I still struggle putting a sandwich together, I'm afraid the industrial-grade construction equipment will have to wait.