... 0~-0.030. 2. Applicable material: Carbonsteel, Alloy steel, Pre-hardened steel(~40HRC ~50HRC),Hardened steel (~40HRC ~50HRC), Stainlesssteel, Cast iron,Nodular, cast ... application: high efficiency machining can be achieved fromcommon steel to pre-Hardened steel.Optimized structure: reasonable combination of sharp cuttingedge and tool strength ...