This swisstech knife is made of carbon steel, also known as 420HC. 420HC brings an extremely high strength and hardness to the knife. The handle is made of nylon which is a solid material, and at the same time a light material. The blade of the knife is locked when it is unfolded, so that it does not fold during use. The knife blade is 10.16 cm. The knife is carefully tested and quality assured, and therefore has a lifetime warranty.