Features: Bead blast finished blade made of 4116 steel. Skeletonized, bead blast finished steel handle. Snap-fit thermoplastic sheath with belt clip. Description: The SDN is a tactical knife design from knife designer James Williams. His expertise in knife design and self-defense shine through with this compact tactical fixed blade! The unique handle design holds the fingers securely, making sure that no matter what, the knife remains in your hand and under control. CRKT Fixed Blades come in all shapes and sizes, from little neck knives to full-size machetes!