New Yorker and Maker Kate Davis knows all about feeling uneasy when out and about in the city at night. She wanted to improve on the hack of keeping her keys between her fingers, so she taught herself to make rings that look like modern accessories, but can lend a self-defense hand if needed. Kate says she made the rings to work as conversation starters and enders, and when you see one in action, you see that she nailed it. Both the sterling silver and lucite designs present as sleek, everyday jewelry, but all styles include a sharp edge. It’s a peace-of-mind piece that you can always have on, just in case.