A saw is a hand or power tool used for cutting materials, primarily wood, metal, or plastic. It consists of a tough blade with a series of sharp teeth along one edge. When the blade moves back and forth or in a circular motion, the teeth cut through the material. There are various types of saws, including hand saws, circular saws, and jigsaws, each designed for specific cutting tasks. Saws can be categorized into two main types: manual saws, which require physical effort to operate, and power saws, which use electricity or batteries to function. The choice of saw depends on the project requirements, such as the material being cut and the desired precision. Proper safety measures, like wearing goggles and gloves, are essential when using a saw to prevent injuries.