Metal base threads directly into the bead of shotguns for a more permanent sight picture • Interchangeable LitePipes allow shooter to match light pipe diameter and color to shooting conditions • Includes eight LitePipes of different diameters and colors • Used by some of the top pro shooters in the U.S. • Allows the shooter to know exactly where the barrel is in relation to the target • Metal base • Four screw sizes to fit most shotguns • Key and custom carrying case included