Okay that's the Universal Grip Implement, UGI. Ban Tang custom, not a ShivWorks design. I tested the proto and Ban made me one after a couple of tweaks. It's pretty slick. It can be run in a thumb side (forward) grip like a push dagger or in a reverse grip like a hybrid kerambit/pakal. It's double edged so probably illegal in most places but the drain itself rocks. I like it alot.