Looking like they were lifted from James Bond's accessories drawer, this set of working pocket knife cufflinks are the perfect not-so-concealed weapons for the aspiring spy. Or, anyone who hates finding a loose thread on their tuxedo.
Made from stainless steel, the $57 cufflinks even come with a diamond dust sharpener so you can keep the tiny blades well honed and deadly. Well, maybe not deadly, given they're too small to cause a lot of serious damage unless you were really dedicated to the cause. But still sharp enough to easily slice open tiny envelopes, miniature plastic blister packaging, or carving up a crabapple.