Watch The InstaBlade CREDIT CARD KNIFE Review The Credit Card Knife Ultra Slim – Folds to the size of a credit card, 2 mm THIN! (The same size as your standard credit card and 1/10th the thickness of your standard utility knife!) Surgical Steel Blade – Stainless steel construction for durable, rust-free sharpness.Built-In Safety Sheath – This prevents any… Read more CREDIT CARD KNIFE