When it comes to versatility, you just can’t beat the bobby pin. It’s beyond easy to use — most of us just pop them in instinctually to get our hair out of our faces, no mirror or thought required.

Sure, many of us don’t hold our hair in place with bobby pins, but just in case we need to break into a secure location, like the broom closet we locked ourselves out of, it wouldn’t hurt to know how ...