This HiViz Pinned Front Sight is bright, ultra-durable and will enhance your confidence and shooting experience. It features an all steel construction and fiber optic LitePipe. Blade Width: 0.125". Blade Height: 0.150". LitePipe Diameter: 0.090". This model is compatible with S&W J Frame with 2.10" barrel or less with a pinned from sight. Pinned sights must be fitted and drilled for the pin. Does not fit 38 Bodyguard Model.