This traditional, small Japanese folding utility knife is springless and lockless--instead it relies on the friction of the mechanism or the pressure of the user’s thumb on the iconic lever (or chikiri ) to keep the blade from folding. The blade itself is laminated high carbon steel which will hold a sharp edge. Two housing types are available: solid brass that will patina over time and with use to a rich finish, or a steel case with a Parkerized "gun metal" finish . Each case is stamped with the name of the maker and steel used in the blade. Blade length 3".