A saw's a tool that uses a hard blade or wire with an abrasive edge to cut through softer materials. The cutting edge of a saw's either a serrated blade or an abrasive. A saw may be worked by hand, or powered by steam, water, electric or other power. In a modern serrated saw, each tooth's bent to a precise angle called its set. The set of the teeth's determined by the kind of cut the saw's intended to make. For example, a rip saw has a tooth set that's similar to the angle used on a chisel. The… (More on Saw)