APEX GEAR Bone Collector 4-Pin Sight .019" Micro Black Four-pin bow sight utilizes extra-long, fully protected wrapped fibers secured in micro, stainless steel tubes Unique dual-end fiber design allows for increased pin brightness in compact size Ultra-fine click adjustment for windage and elevation helps boost firing accuracy Aperture has two-inch inner diameter; micro push-button light; adjustable for left and right handed users; reversible bracket and tool-free design Includes limited manufacturer's warranty of at least 90 days; details included with purchase