Knife, Otf Knife, Butterfly Knife manufacturer / supplier in China, offering 9.5" Damascus Otf Bm3300 Knife Aluminum CNC Automatic Knife, 5.3 "Donut Otf Utility Knife Replaced Blade Automatic Knife 5 Blades, 5.3 "Otf Replaceable Blade Knife, High-Quality Pocket Knife Aluminum CNC and so on.