Camillus MASK 9" Fixed Blade Knife with a Prym1 Camo handle and 420 Steel Blade. 420 is a hard and strong steel is commonly used in knife blades and offers good corrosion resistance at a low cost. The steel is bonded with Titanium that resists rust and corrosion and is up to 3x harder than untreated steel so the blade stays sharper, longer. 4" Drop Point Blade. Lifetime Warranty.