Hombre contains difethialone, a single-feed, 3rd generation anticoagulant. It's the newest and most active ingredient against rats and mice. Its advanced chemistry (high efficacy at low dose) allows Hombre to be formulated at 50% of the concentration of other products in the marketplace. This makes Hombre virtually undetectable. In addition, Hombre is made with whole and ground food-quality grain and has an attractive odor. It's palatability results in optimal acceptance which helps to drastically decimate rat and mice populations. The bait must be consumed to be effective, and rodents will eat HOMBRE for sure. Keep in a cool, dry place.