Description Matrix II high speed steel edge of the band saw blade is designed for heat and wear resistance 8% Cobalt Content For Added Durability & Wear Rc 65-67 Tooth Hardness For Increased Wear Resistance Alloy Steel Backer for Fatigue Resistance Product Description Packed with a Matrix II High-Speed Steel Edge, 8% cobalt content, and Rc 65-67 tooth hardness, DEWALT Bi-Metal Portable Bandsaw Blades can stand up to extreme heat and wear. An alloy steel backer resists fatigue. From the Manufacturer DEWALT DW3989 18TPI Portable Band Saw Blade – 44-7/8-Inch, .025-Inch – 3 pack
