The Klein Tools Double-Edged Duct Knife Is Built For Precision and Durability, Featuring A Double-Edged Stainless Steel Blade Designed For Smooth and Serrated Cuts On Flexible Duct, Duct Board, and Insulation. Its Reinforced Steel Tang Adds Strength and Stability, While The Impact-Resistant Sheath Ensures Secure Storage and Convenient Blade Removal. With An Ambidextrous, Dual-Material Ergonomic Handle and Sheath Belt Clip, It Offers Comfort, Control, and Portability For Demanding Tasks.