Lenox bi-metal hacksaw blades with there Tuff Tooth design and tooth hardness of Rc 64-66 are very flexible, have shock resistant teeth, resist heat and are virtually unbreakable. These features make them ideal for cutting tough materials like stainless steel. Features: Fiberglass Granite Cement Plywood Benefits: The most recent improvement that Lenox has made to its bi-metal manufacturing process is the patented technology called tuff Tooth This innovative tooth desigh greatly recduces tooth strippage, especially when cutting tough matreials like stainless steel. HACKSAW BLADE 12X1/2X023X18 218HE AMERICAN SAW