Smith & Wesson Trigger Lever S&W 31, 32, 34, 36, 37, 38, 42, 49, 60, 63, 317, 331, 332, 337, 337PD, 340, 340PD, 342, 342PD, 360, 360PD, 431PD, 432PD, 442, 631, 632, 637, 638, 640, 642, 649

Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts. Some parts may require installation by a qualified gunsmith.