Cold Steel's Double Agent I and II neck knives possess a significant set of advantages worth noting. They are thin, flat, and super light (a little over 3 ounces including sheath). This makes them easy to conceal and very comfortable to wear. Their most audacious and notable feature, however, is their double ring handle design. Slip an index finger through the front ring nearest the blade and your pinky finger through the rear ring and close your fist to obtain a forward grip and vice versa for a reverse grip. It doesn't matter how hard you cut, chop, hack, hammer or thrust with the Double Agent. Its twin rings will prevent your hand from sliding forward on the razor sharp edge and will likewise resist the effects of centrifugal force or the efforts of an adversary to wrest the Double Agent from your grasp.