Replaces the factory part and includes a reinforced cam finger that's designed with no safety cut for added strength. Threaded through to decrease weight; threads match Winchester 70 firing pin. Steel cross-pin simplifies installation of Speedlock firing pin. Mfg: David Tubb SPECS: Steel, black oxide finish. 1A 1/4" (3.2cm) long. .220" (5.6mm) I.D. Fits all long action, Winchester 70 models pre '64 to present.