The money clip has been around a little while, invented during China’s Han Dynasty in 118 BCE. This money clip pocket knife incorporates the benefits and added usefulness of a pocket knife to that design. The closed length is 2 1/8″, very pocket friendly. Typically there are 2 blades: a primary pen blade and a nail file. This is a great way to carry your currency and have the utility of a pocket knife in the same frame.