1.Material JIS SKD61 2.Heat treatment :Nitrided 3.Ejector pins Die Standard Component mold parts good quality with low price. Ejector pins Detailed Product Description1, Material JIS SKD61 2, Heat treatment:Nitrided 3, I.H Inner Hardness:HRC42±2° 4, S.H Surface Hardness :HV9001000° 5, Vacuumed :HRC52±2°More information of this locating lock please refer to our company website.