2" up to 20"HSS Saw Blades are designed for cutting non-ferrous metal and plastic where maximum cutting life between sharpening is required?. Ideal for sawing a wide variety of sizes and shapes such as extrusions, tubes, sheets, plates and some bar stock. M-2 HSS blades are recommended for production saws equipped with power-feed controls, clamping fixtures and lubricant spray or mist. This style of high speed blade operates at a higher RPM when compared to Cold Saw Blades. http://www.youjie-tools.com/saw...ades/hss-saw-blades.html