A multi-tool is any one of a range of portable, versatile hand tools that combines several individual functions in a single unit (e.g. knife, saw, file, screwdriver, pliers, tweezers, bottle-opener, etc). The smallest are credit-card sized units designed to be carried in a trouser pocket or belt mounted pouch. Often, the tool is called by its many different types of names which is actually referring to the name brand of the OEM for the multi-tool. Some common manufacturers or names you might hear it called are: * Leatherman * Craftsman * Gerber * Coleman * Swiss