Raid Double Control Roach Baits kill the roaches you see as well as the ones you don't see with two types of bait. After roaches feed on the bait, they return to the nest and transfer the bait to the others. Population reduction and less activity can be expected within days, with the baits working continuously for up to three months. Raid Double Control Roach Baits are child-resistant. Read label before use. Use only as directed.