Kershaw Secret Agent (4007); Concealable Boot Knife with Strong Single Edge 4.4 Inch 8Cr13MoV Steel Blade; Arrives with Dual Carry Molded Sheath and Stealthy Non-Reflective Black Oxide Finish, 3 OZ. 8Cr13MoV stainless steel blade with high carbon is heat treated for performance, hardness and durability Handle is reinforced synthetic polymer encased by textured rubber for grip security; reinforcement provides increased strength, stiffness and stability Tech rich black oxide coating converts steel to magnetite to boost appearance and corrosion resistance High performing sheath provides clip for belt or UWB carry and slots for leg carry straps; both ensure users preference for accessibility Blades first edition survives torture test seen on Survival Bros; fans claim it slices through plastic, aluminum, kelp, rope, jellyfish and fiberglass