This guide provides an overview of the safety precautions to take when using a circular saw. It covers topics such as proper saw setup, blade selection, and safety gear. It also includes tips on how to use the saw correctly, how to avoid common mistakes, and how to handle the saw
From Wikipedia
A circular saw or buzz saw is a power-saw using a toothed or abrasive disc or blade to cut different materials using a rotary motion spinning around an arbor. A hole saw and ring saw also use a rotary motion but are different from a circular saw. Circular saw may also be loosely used for the blade itself. Circular saws were invented in the late 18th century and were in common use in sawmills in the United States by the middle of the 19th century.