Ultra-fine click adjustment for windage and elevation. Tool-less design. Extra long, protected, wrapped fibers. Precision pin alignment eliminates distortion. Large circular field of view. One-piece head reduces vibration. Aperture has a 2" inner diameter. Glow-in-the-dark shooter's ring helps align peep sight. Adjustable level with two vertical bars. Level is illuminated by luminescent shooter's ring. Reversible bracket for greater vertical adjustability. Adjustable for left and right handed shooters. Three sets of markings for elevation, windage and pin adjustments. TG5301B  5 pin (5x.029 dia.) with light