Bi-Metal Jigsaw Blades providing a straight coarse cut suitable for all wood types. 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. Side Set & Sharpened (SSS) cut give a fast, medium cut.