Allows the shooter to know exactly where the barrel is in relation to the target Interchangeable LitePipes allow shooter to match light pipe diameter and color to shooting conditions Includes two white, three green and three red LitePipes Used by top professional shooters Metal base � Five screw sizes, 3/56, 3x.5, 3x.6, 5/40 and 6/48 to fit most shotguns LitePipe changing key and custom carrying case are included (not shown)