The circular saws are metal disc or blade with saw teeth on the edge as well as the machine that causes the disk to spin. It is a tool for cutting wood or other materials and may be hand-held or table-mounted. These are almost exclusively powered by electricity, larger ones, such as those in saw mills, are traditionally powered by water turning a large wheel. Most of these saws are designed to cut wood but may be equipped with blades designed to cut masonry, plastics or metal although there are purpose-made circular saws specially designed for particular materials.

Circular saw blades are sized by the diameter of the blades. Circular saws have two basic body styles such as worm drive and sidewinder. Circular saw blades are made for specific machines & a sliding compound mitter saw blade, These saw blade have thinner blade bodies and cut a narrower kerf & require less energy from the tool during cutting. Circular saw blades are available with or without carbide-tipped teeth.