A circular saw is a powerful tool used for cutting various materials, primarily wood and metal. It features a toothed circular blade that spins rapidly, allowing it to slice through materials with precision. Circular saws are popular among both professionals and DIY enthusiasts for their versatility and efficiency in making straight cuts. These saws come in different sizes and types, including cordless and corded models, making them suitable for various projects. Safety is crucial when using a circular saw, so it's important to wear protective gear and follow proper operating procedures to prevent accidents.