A sierra circular, or circular saw, is a power tool used for cutting various materials, primarily wood and metal. It features a toothed circular blade that rotates at high speeds, allowing for straight cuts with precision. The tool is commonly used in construction, woodworking, and metalworking projects. The sierra circular can be handheld or mounted on a table for stability. It is equipped with safety features, such as blade guards and electric brakes, to protect users during operation. Proper handling and maintenance are essential to ensure safety and prolong the tool's lifespan.