Chop saws, cut-off machines, and cold saws cut metal and plastic in fabrication, machine shops, and automotive applications. Cold saws are used in high-volume cutting applications and use coolant to keep the blade and workpiece cool, extending blade life and eliminating thermal expansion that can alter the grain or create oxidation. Cut-off machines have a continuous-rim abrasive blade used to cut metal alloys and other hard materials that cannot be cut using a toothed blade. Chop saws use a toothed blade. They spin at a lower rpm and produce less sparking than cut-off saws, which reduces heat buildup in the blade and workpiece.