The Paradox series is designed from the ground up to mimic a traditional balisong, or butterfly knife, in every respect but one--it can't be opened with one hand. The handles rotate 180 around the blade's unique split tang and uses strong opposing spring tension to lock the blade open or hold it firmly closed. Japanese AUS-8A stainless steel blade Aluminum handle, tip up stainless steel clip. Comes with original box. Has some light scuffs and scratches, otherwise great condition.