Bi-Metal Jigsaw blades providing a straight clean cut, suitable for all wood and plastic. The bi-metal blade is the combination of both a high carbon steel (HCS) body and a high speed steel (HSS) cutting edge. Giving strength and flexibility at both low and high temperatures. A tough, shatter resistant blade that keeps its edge longer. Extended service life leads to greater cost effectiveness per blade. Ground & taper ground (GTG) teeth give a clean, quick cut.