Features: 1) Material: Japanese stainless steel 440C, 9CR or according to customers' requirements 2) Screw: collocated key screw (you can also choose the screw by yourself) 3) Blades hardness: Rockwell 58-60 4) Available sizes: 5.0", 5.5", 6.0", 6.5" 5) Customers' designs welcomed 6) OEM orders welcomed Inner packing: 1pr/PVC bag, 20prs/paper box Outer packing: Carton