... steel 2. Core Hardness: Hardened through to 41-45 RC 3. Surface hardness: ion nitride to 65-74 RC 4. Heads annealed ... Available for DIN, HASCO, DME and JIS standard We offer to sell step ejector pins, die sets, ejector pins, core pins, precision ... , guide pin, guide bush and ball cage.Do feel free to contact me at any time should you have any questions.