Mikov Kostka is a practical knife with a very unusual opening system, which most closely resembles butterfly knives. The name "Kostka" is derived from the shape of the knife in the closed position.
The plain, drop point blade is made of stainless steel 440A with a hardness of 55-57 HRc. The blade length is 62 mm, thickness 2 mm and height 9 mm.
The handle consists of two rectangular movable parts which need to be flipped 180° to open the knife. Due to the very compact dimensions of the handle, the blade is rotated by 45° so that it retains its strength. Thanks to this original opening system, the knife does not need any lock – it is secured by the fact that you are holding both parts of the handle together.
In the open position the overall length of the knife is 142 mm and in the closed position 77.5 mm. Even though the entire knife is made of steel, it weighs only 40 g. It is therefore suitable for everyday carry in a pocket.