The OL-5019 has been a staple in the archery industry because of its solid aluminum construction and smooth and repeatable adjustability. HHA's ARMOR technology provides an extremely durable pin that fully contains the fiber in an ultra thin aluminum pin for superior breakage protection without obstructing the archer's view. The OL-5019 contains 3 feet of fiber optic for extreme lowlight performance and weighs just 8 oz. making it perfect for today's lightweight bows. The OL-5019 sets the bar for single adjustable pin sight performance.