Today we will cover a few different variations of the credit card knife both fixed and folding blades. First on the cutting board is the SOG AC77 Access Card 2.0 a folding blade knife is made of VG10 steel with an attractive tactical black finish, this premium Japanese steel is specially designed for high-quality blades used in cutlery and known for its durability and maintaining a hardness of Rc 60 without becoming brittle. The blade length measures 2.75 inches and when closed the SOG AC77 Access Card 2.0 measures 3.45 inches. The item comes with the SOG limited lifetime warranty and makes for a great concealable self defense option. Next on the list is the Boker Plus Credit Card Knife which is also of the folding blade variety and like the SOG AC77 Access Card 2.0 gets an average consumer rating of 4.5 stars. The knife is made from 440C stainless steel with an inner titanium liner, the closed length measures 2 3/4 inches and the blade adds 2 1/4 inches. The item weighs 1.1 oz and is even small enough to fit into the credit card slot of most wallets. Last but not least we have the Gerber GDC Money Clip which unlike the first two blades reviewed is a fixed blade knife. This blade is made out of titanium nitride coated steel body and measures 1.75 inches. The closed length is 3.6 inches and weighs 2.9 oz. The money clip can hold up to five credit cards and will easily fit in your pocket, purse, or jacket. The blade sits securely in its place until needed and is easily deployed via a thumb button safety. The Gerber GDC Money Clip blade comes with a lifetime warranty. All three blades are ideal for light, compact, and concealable self defense options.