Mcusta creates custom quality production knives that are hand finished. Machine Custom = Mcusta. Located in Seki, Japan, the company holds an esteemed reputation for producing the finest Japanese folders. This knife features a superior VG-10 core san mai damascus steel blade with damascus styled stainless handles and stainless steel liner. The pocket clip is designed for tip-up carry and reversible for right or left-hand carry. Stock photos. Mcusta Factory Authorized Dealer.