The movable vertical pin has 5 ft. of wrapped .019 fiber-optic material attached to an integral rheostat dial so you can adjust brightness. Tough, lightweight CNC-machined-aluminum construction with vibration-resistant cap screw and windage lock. Smooth elevation hinge with easy-access knob. Right hand only. Manufacturers lifetime warranty. Made in USA. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Bow Sights.