The Card Sharp Is An Ultra-light And Ultra-thin Utility Knife That Fits Comfortably Into Your Wallet. At 2.2mm Thin, The 13-gram Card Sharp Transforms From A Credit Card Sized Sheet Into A Well-balanced Knife With A Sturdy Handle. The Waterproof Card Sharp Features A Nearly 3-inch Long Blade Made From Surgical Steel, And The Polypropylene Handle Is Guaranteed To Last A Lifetime Of Unfolding And Folding. A Clever Locking Mechanism Prevents Accidental Cutting Or Blunting When The Card Sharp Is Closed. Ensure You're Always Prepared With The Card Sharp Credit Card Knife.