Knuckle dusters were, once upon a time, considered very badass. Nowadays, everyone from Pamela Love to Forever 21 makes a version, most of them exceptionally retail-friendly (think: encrusted with rhinestones, inspired by nature, etc.). Of course, if it's a ring that doubles as a B-list weapon you're after, spiked and studded spins still abound. Click ahead to see 23 finger-spanning takes on one-, two-, three-, and even four-digit rings; featured designers include the aforementioned Love, Bijules, Dannijo, and Made Her Think.