When you need to bring a knife to a gun fight, nothing beats the Tec X Dinero ($15), TEC-9’s older, more stabby brother. The Tec X Dinero is a dagger/money clip hybrid that includes a frame lock for safely stabbing anything that needs a good stabbing. Perfect for gouging, gashing, slashing, perforating, puncturing, piercing, cutting, slicing, bisecting, dissecting, lacerating, carving, and spreading margarine on toast. Wildly brandish this stainless steel blade in celebration at your child’s next piano recital. Or label it “the old hijackin’ knife” and hide it in your carry-on. TSA will get a kick out of your hijinks once they stop macing you.