The New Guardian 93512 Tactical RECON-035 D/A OTF Automatic Knife Stonewash Serrated Edge Blade. Guardian Tactical. This RECON model is built with a stonewashed 154CM blade and a black anodized handle. The unique thumb slide design is separated from the aluminum handle by a steel plate and 3 ceramic balls that eliminate grinding and wear. An innovative locking mechanism sits off to the side of the blade channel so it doesn't drag against the blade when opening and closing. These features eliminate the friction on the blade and button that have always plagued OTF knives. Take your OTF game to the next level with the Guardian Tactical RECON-035.