Core Pins Stronger Hardness, Abrasion Resistant, Corrosion Resistant. Standard Punch.. Core PinsInlay Type. Type:CP,IRHB,IRB,CPS,CPSB,BCDS,GCM. Material: SKD-61 & SKH-51 & SKD-1, etc. Hardness: HRC48 - 60, Abrasion resistance, Good toughness, Easy processing. We can make the product by your drawing with the size and data marker , Then supply the best service for you sincerely..