• Allows you to sight-in at extended ranges faster than ever • React Technology activates when your fixed 40 yard pin becomes a movable pin allowing you to sight in out to 100 yards • Mathematical precision of React Technology automatically adjusts all pins to the optimal location • Strengthen accuracy at severe angles with 3rd axis leveling • 100% tool-less micro adjustment • Durable 100% machine-aluminum construction • Pin size: .019" • Includes: Mounting hardware, rheostat light, and yardage stickers