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KNIFE BLADE

A blade is the portion of a tool or machine with an edge that is designed to puncture, chop, slice or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are to be used on. A blade may also refer to a "fan blade" such as that used in the movement of air or a gas.

A knife (plural knives) is a tool with a cutting edge or blade which may or may not be be attached to a handle. Cutting implements, such as those used in mechanical food processors are similarly referred to as knives. The blade edge can be tapered or serrated, or a combination of both. Single-edged knives may have a reverse edge or false edge. These edges are usually serrated and are used to further enhance function. Knife blades can be manufactured from a variety of materials.