The SOG Vulcan Mini Tanto VL-04. This knife is featured with SOG’s Arc Posted on August 10, 2017 by SOG-Knives.net StaffAugust 10, 2017 Reply The SOG Vulcan Mini Tanto VL-04. This knife is featured with SOG’s Arc-Lock system. #sog #sogknives #vulcan #mini #tanto #vl04 #arclocksystem posted via instagram by sogknives4u on Aug 10, 2017 @ 16:42