Combat Source Kill safeguards your home with complete ant control. These baits are specially formulated with the Hydramethylnon insecticide that will kill the queen and destroy the entire colony. These easy-to-use, child-resistant baits need no activation and are mess free. Simply place the baits down and they will continue to protect your home from ants for up to three months. Combat quick kill ant bait kills common household ants, including the queen. Works overnight. Contains 0.01 percent fipronil. Starts killing within hour.