A circular 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 saws may also be loosely used for the blade itself.
Material quality used in blade production is very important. Material quality impresses precision.
Applying too much and sudden pressure can break the teeth of the saw. If the metal part cut, applying too much pressure will cause the metal to overheat, resulting in burr.