This HiViz Pinned front sight is durable enough for the most extreme use. It has two unique features: the LitePipe has a square profile instead of round and the base is pre-drilled for the retaining pin allowing for easier installation. Blade Width: 0.125". Blade Height: 0.269". LitePipe Diameter: 0.090". This orange model is compatible with your S&W Revolver with 2.50" barrel or longer. Pinned sights must be fit and drilled for the pin. Does not fit Classic and Performance Center Models. Front Sight Length: 0.895". Front Sight Width: 0.124". Front Sight Height: 0.394".