The Hogue EX-F01 is a robust fixed knife. The blade is made from A2 tool steel. A type of steel that is only partially corrosion resistant. Fortunately the KG 2400 GUN-KOTE coating protects the knife from rust. The edge, however, does need a bit of TLC once in a while. Fortunately, this is more than compensated for by the toughness of this type of steel. As such it is a popular type of steel or combat knives.