A hacksaw is a hand tool used for cutting hard materials, primarily metal and plastic. It consists of a sturdy frame that holds a thin, serrated blade under tension. The blade's teeth are designed to cut through tough materials, making it a common tool in workshops and construction sites. Hacksaws come in various sizes and can accommodate different blade lengths and tooth configurations. The tool is often used in conjunction with other tools, such as files and saws, to achieve precise cuts. Proper technique and safety measures are essential when using a hacksaw to prevent injury.