Apex Gear Axim 4-Pin Sight .019" Extra-long, fully protected wrapped fibers. Micro, stainless steel tubes protect fibers. TRUTOUCH soft-feel technical coating. Unique dual-end fiber design allows for increased pin brightness and compact size. Ultra-fine click adjustment for windage and elevation. Tool-less design. Adjustable level has two vertical bars. Reversible bracket for greater vertical adjustability. Laser markings for windage, elevation and pin adjustments. Large circular field of view. Aperture has 1.8 inner diameter. Accepts 1.87 scope lens. Glow-in-the-dark shooters ring. Adjustable for left and right handed users. Micro push-button light included.