You know you are officially an adult when: you start wearing cufflinks and the moment you want a good, sharp knife for your collection. In this edgy section of cufflinks, we feature a series of fashionably sharp knife Cufflinks, meant to add that extra edge to your ensemble. Toting around a three inch blade may be illegal in most states, but that doesn't mean you can't indulge in a little knife cufflink action. Maybe it's time you buy one for yourself and for a friend, so you can have a stylish "knife fight" together. On second thought, maybe just buy a second one as a gift and just leave it at that. Novelty cufflinks are more popular than ever, because they allow men to have some fun and be creative whenever they head out on a date, attend a business meeting or formal affair, or get together with family and friends. Cufflinks in this section are ideal for knife collectors everywhere. It's time to mix a little knife action in with your fashion choices, just be careful not to hurt yourself (or others!) with your razor sharp style.