This knife was designed to be both clandestine and pre-positioned for deployment. The most ignored things that people carry are coins; rarely does anyone pay the slightest attention to a bunch of coins, even during searches. Keep this device along with some regular coins in your pant's back pocket, and it can be quickly accessed even with your hands bound behind your back. To expose the blade, the coin separates into two parts. The two parts of the coin are held securely together utilizing a rubber o-ring concealed in a channel around the coin's perimeter. The coin portions provide a solid grip handle. Weight: 0.35 oz. Made in USA.