The Boker Credit Card Knife is a valuable tool in anyone?s survival kit. Unlike similar knives, the Boker Plus Credit Card Knife is designed to maximize carry options. Its slim profile and pocket clip ensure that anyone who wants to carry this around will have access to it at all times. But it can also be worn in a shirt pocket, inside of a wallet, or even on a lanyard. The 440C stainless steel blade ensures that you do not have to sacrifice quality for portability. This steel is good at holding and maintaining an edge and does not corrode easily. Because this knife is meant to be used in a variety of situations, it is highly modifiable. The clip can be taken off to remove excess width and make it easier to carry in a wallet. Without optional accessories removed, the knife is only four mm. wide. With accessories, this credit card knife is 5 in. long with a 1.1 oz. weight. The blade is 2-¼ in. long. Limited lifetime warranty. A chestnut tree is the world famous trademark of the Boker knife manufactory in Solingen, Germany. It represents innovative, high quality, exceptional knives, manufactured with pride, by hand, for over 145 years.