Formulated with food specifically designed for American roaches and other large roaches, plus the fast-acting insecticide Fipronil, which starts killing within hours. Like all Combat products, these baits target the nest to eliminate the source of the problem, not just the few roaches you see. Kills roaches fast before they multiply for long-term control. Guaranteed to protect your facility from roaches for three months. These easy-to-use baits need no activation. Simply place them down for up to three months of large roach control.