Specifications: CM Full length: 18.5 Blade length: 7.5 Blade thickness: 0.25 Blade width: 3.4 Handle material: All steel Blade material: 440 Hardness: 55 Weight: 120g Lock: Mechanical lock Blade: Sharp Surface treatment: Black titanium treatment belt Back clip, original paper box. Unique shape, innovative operation method, breaking the traditional concept, giving you a completely new look! Opening the knife: The triangular part at the end of the knife handle can be like a movable clip. Use your fingers to clamp it with a little force to open the knife blade. (See the attached picture) To close the knife: Press the triangular tail of the handle to fold the blade. (see attached picture)