This blade is designed for extreme cuts in tough construction applications. The 6 Tpi, 9 in L blade is made from a bi-metal construction with premium materials that provide durability and dependability. Flexible break resistant combination of high speed steel teeth laser welded to flexible spring steel backs.Bi-metal constructionFlexible break resistant combination of high speed steel teeth laser welded to flexible spring steel backs9 in L6 Teeth per inch (TPI)Fast rough cutting for wood, wood composites and plastic; use on wood that has nails or screws embeddedBlade thickness of .0312 in