The Mantis Vuja De is a crossover knife that sports a karambit body with a balisong/butterfly build. Skeletonized black and red G-10 and nested steel liners make up the handles, which lock open and closed using the spring loaded latch and push button lock. The Vuja De also features a finger ring and reversible tip-up carry pocket clip. The hawkbill blade is satin finished M-VX steel with deep jimping on the spine. The action on this knife is smooth and sure to please!
I love the look and concept of the "Vuja De" knife. So I purchased three MK-4s, gifting two to my sons for Christmas. On the first couple of days I occasionally practiced a one hand deployment of the knife. As my success rate was improving it suddenly stopped. As I analyzed my technique I realize it is the workmanship of the knife. First, the pin that the moving handle spins on is becoming loose and allows lateral movement, resulting in the locking clip occasionally hits the handle instead of aligning with the slot of the receiving handle. The second problem is the spring (that keeps the locking clip in the optimal position to lock open) is losing its tension. So when the knife handle spins open, if the clip aligns with the slot in the handle, it no longer aligns with the pin within the handle. If you are looking for a unique display knife this is definitely a conversation piece. If you are looking for a practical, functioning karambit purchase a fixed or folding model from this website.