Quality steel replacement parts for the 1911. May require slight fitting.Notes:FeaturesAverage diameter of 1911 .45 caliber firing pins is .095"-.096" at tipAverage diameter of 1911 .38 Super and 9mm caliber firing pins is .070"-.071" at tipIf the firing pin caliber needed is not known, check the hole size in the recoil face to determine the caliber firing pin needed for your slide before orderingWill not fit Springfield Armory 1911s