... .5,D250*d70*3.5. There are various of grade for different applications. Grades and ApplicationsGradeDensityT.R.SHardness Performance & application recommendedISOg ... speed.K20YG10X14.5220091.0Fine grain alloy, good wear resistance , Used for processing hard wood, veneer board, PCB,PVC AND METALS.K20YS2T14 ... steel and high manganese steel, etc.K30~K40 - K40 carbide saw blades