Gives you the sight picture of a single pin and the convenience of multiple pins.  Vertical In-Line Technology.  Constructed of Ballistix Copolymer, the strength of aluminum but 25% lighter.  Soft touch Ballistix coating delivers added vibration reduction.  Tool-less micro windage and elevation adjustments.  Glow-Ring superior in low light.  5 - .019" fully protected ultra-bright fiber optics.  Sight light included.