Alien Robot Tactical Liner Lock Pocket Folding Knife Survival Hunting, Black, Come with Sheath This knife is very wonderful, different from others. how to open and how to close? I think you must be very interested in this knife. Condition: Brand New in Original Box Lock: Mechanial lock  Surface: Black Titanium Total Length: 17cm  Blade Length: 6.9cm  Grip Length: 12.0 cm Patent product with unique structure and innovative design , put away the traditional construct.