HIVIZ sights are machined from solid steel and feature fiber optic LitePipe inserts for increased visibility and faster sight acquisition in all conditions. Includes interchangeable lite pipes. installs with factory elevator screw and T nut which are included. FeaturesLITEWAVE interchangeable LitePipe designIncludes green, red and white LitepipesAll steel constructionLitePipe diameter 0.070"Windage and elevation click adjustmentFits S&W revolvers with factory adjustable rear sight produced from 1998 to current. Does not fit J Frame models.