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 competitive saws. Applications: All Woods, Nail Embedded Woods, Composition Material, Plastic, Light Gauge Non-Ferrous Metals & Aluminum; 5/8 in.Width For Higher Flexibility.