Armor Piercing Butterfly knife by Bear and Sons Cutlery. 5" high carbon stainless steel hollow ground blade Epoxy powder-coated handles.Blade Material : 440 Stainless Steel (Black TI Coat) Handle Material : Zinc (Black Epoxy Powder Coat) Blade Length : 3-3/8" Overall Length : 8-7/8" Closed Length : 5" Weight : 5.7 oz. Extras : Hollow Ground/Armour Piercing Blade