The combination of our expert history in precision grip manufacturing with modern laser technology has resulted in a superior patented laser enhanced grip with all of the Hogue grip features you have come to expect. Finger grooves naturally position fingers for optimal grip. Re-sighting is not required with battery changes. This model fits Smith & Wesson: 30, 32, 33, 34, 36, 37, 38, 43, 49, 50, 51, 60, 63, 317, 331, 337, 351PD, 360, 431PD, 442, 631, 637, 638, 649, 650, 651.