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″.