The DeWALT® 24 TPI portable band saw blade (3-pack) is built to last, with a number of exclusive technologies designed to give you confidence that the blade will resist wear throughout its lifespan. An 8% cobalt content and ROC 65 to 67 tooth hardness maximize durability. with an alloy steel backer and matrix ii High speed steel edge, users never need to worry about heat and fatigue. DeWALT® understands that you cant afford to invest in an inferior product. All DeWALT® products are extensively tested to ensure that they wont let you down on your real world jobsites. DeWALT® DW3984C Cordless Band Saw Blade, 32-7/8 in L, 24 TPI