Improve the performance of your S&W revolver with a HIVIZ sight. Our bright and ultra-durable sights will enhance your confidence and shooting experience. Features: HIVIZ resin overmold design Most durable sight available All steel construction LitePipe diameter 0.09 inches Blade width 0.125 x 0.269 tall Limited lifetime warranty under normal conditions and proper use of firearm Pinned sights must be fit and drilled for the pin, we recommend installation by a qualified gunsmith Fits most Smith & Wesson models with 2.5 inches, or longer, barrels, and adjustable rear sights, excluding classic series, and performance center guns