Camillus CHUNK™ 7.25" Folding Knife with a Glass Filled Nylon handle and 420 Steel Blade. 420 has decent edge holding capabilities and fairly easy to resharpen, this steel is a good balance of the most desirable traits for knife steel. 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. The handle is made of Glass Filled Nylon, a material that is used in many of our knives. We add glass-filled materials to polypropylene, ABS and other substrates in order to provide the strongest, most rigid handles. Lifetime Warranty.