The Signet Ring – ParaMilitary Series adds a unique and convenient way to deploy and control the Spyderco(R) ParaMilitary 3 series of knives. The Wise Men Company Signet Ring makes some of the most popular EDC pocket knives available, even better! Simply insert the precisely machined aircraft grade billet aluminum Signet Ring and you have turned your knife into the knife that dreams are made of. No additional hardware is needed. The Signet Ring internal 1″ diameter allows most fingers to easily slip through to draw the knife from the pocket. The shape and jimping on the the outer part of the ring provides positive control and a striking surface.