The Diablo DS0908BFD5 reciprocating saw blade design is ideal for metal demolition applications. The blade has an ultra hard cutting edge. As a result, it delivers up to five times longer life than those of standard blades. It has a Rockwell Hardness of HRC 62 versus HRC 55 for standard blades. Additionally, the dual Tooth design features a double tooth configuration with small gullets. This results in faster material removal and extra durability. This blade is intended for thick metals from 3/16 to 9/16 inches.