Black Small Marine Knife Replica Letter Opener Mini Dagger Tanto Serrated Edge Overall Length: 6", Blade Length: 3.5", Handle Length: 2.5" Blade: Slightly Sharpened, 440 Stainless Steel. The handle is tough rubber with the traditional ribbed design. The sheath of the knife is PPS plastic with a safety lock and neck chain. A steel plate has been added to the sheath that reads "Semper Fidelis".