Crafted with precision from high-quality 6150 bar stock, this firing pin is engineered to meet exacting tolerances, ensuring superior performance and reliability. Undergoing a meticulous heat treatment process, it boasts an extended service life that far surpasses that of standard firing pins. Designed to seamlessly fit both 70 and 80 series, this firing pin is a testament to durability and precision engineering. With a lifetime guarantee, it promises unwavering performance and peace of mind for the discerning user. 6150 stainless steel, heat-treated Compatible with series 70 and series 80 1911 pistols chambered in .45 ACP, featuring a diameter of 0.091 inches