Made with Matrix II high speed steel teeth containing 8 percent Cobalt to keep a sharper tooth edge longer. Faster cutting, longer life blades that can bend without shattering. This blade has a 1/2 inch universal tang that fits all Sawzalls and standard c ompetitive saws. Applications: All woods, Nail Embedded Woods, Composition Material,Plastic, Ferrous & Non-Ferrous Metals.