Makes sighting in your rifle absolutely easy; The quickest, most efficient, and most accurate way to find your zero at 25 yards in just one shot, giving you the ability to sight in your rifle at 100 yards in just 2 more shots HOW IT WORKS: Using 2 precision lasers it guarantees you hold your rifle in the exact same place for each shot, completely eliminating hold error and minimizing recoil-induced flinching Works with most calibers/gauges and works across many platforms -- centerfire, rimfire, airgun, or crossbow