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. This red model is compatible with your S&W Revolver with 2.50" barrel or longer. Blade with: 0.125". Blade Height: 0.269". LitePipe Diameter: 0.090". Does not fit Classic and Performance Center Models. Front Sight Length: 0.895". Front Sight Width: 0.124". Front Sight Height: 0.394". Type Front Style Fixed Front Sight Fiber Optic Series Front Sight Firearm Fit S&W Models with 2.5" or Longer Barrels Frame Color Black Front Color Red Fiber Optic Firearm Type Handgun Fiber Diameter 0.090" Frame Material Steel Front Material Fiber Optic LitePipe