Probe Industries H-13 Tool Steel Wrist Pins are designed to deliver the ultimate in weight reduction while maintaining maximum strength. H-13 provides 289.000 psi tensile strength with a ultimate yield strength of 239,000 psi, along with increased ductility (30,500 ksi) compared to alternative materials. H-13 tool steel pins are available in both straight and taper wall designs. Both are suitable for virtually all racing applications.