Bryco Jennings Model 59 Firing Pin Fits Model 58 as well Stainless Steel Firing Pin Pin Length: 1.637, Nose Diameter: 0.080. Using our in house CNC Swiss turning centers the Firing pins are machined from domestic 17-4 Stainless Steel then heat treated to a H900 Condition. We machine the firing pins from Stainless Steel to help eliminate internal corrosion issues and improve reliability MADE IN THE USA!!!!