I had to replace my thumb opening pocket knife due to arthritis. This knife opens in a "twitch", easy release and has a positive lock back. A Nice size for pocket carry with the side clip. I'll also purchase the next size larger soon. Delivery was fast and saved me from driving to a sporting goods store to inspect products. Fed X missed my address and came back the next day to place package inside the storm door. Thanks Fed X. Thanks Buds...see you soon!