Utility Knife Features A Long Blade Design To Efficiently Cut Through Thick Materials, Including Triple-Wall Corrugated. The Advanced Ceramic Material Is Rustproof, Nonconductive, Antimagnetic And Won'T Spark. The Slow-To-Dull Blade Starts At An Effective Sharpness And Retains Its Safe Cutting Edge For Up To 11 Times Longer Than Steel For Consistently Smooth Cuts Again And Again. Auto-Retractable Blade Stays Out Of Harm'S Way When You'Re Not Using The Knife For Safe Storage. Ambidextrous Design Provides A Comfortable Grip For Both Left-Handed And Right-Handed Users. Easy, No-Tool Blade Change Allows You To Simply Replace Dull Blades Without Requiring Any Extra Tools. Lanyard Hole Allows You To Keep This Unique Tool In A Convenient Location To Ensure It'S Always Close At Hand. Utility Knife Includes One Double-Sided, Rounded-Tip Safety Blade.