Terro Ant & Roach Baits give you two insect-killing resources in one product. The top of the bait station targets the sweet-eating ants that are common visitors to kitchens and other areas. The bottom bait area attracts and kills cockroaches. Borax is used in Terro Liquid Ant Killer and these Ant & Roach Baits. Why do we keep using borax? It's simple - It Works! This substance interferes with ant digestive systems, killing them slowly so they can spread it to the rest of the colony. Cockroaches, silverfish and non-sweet eating ants love the protein bait in this bait station. To make it easier for these insects to access this deadly bait, there are three insect-sized access holes. After consuming this bait, the insects die a short time later. The Terro Ant & Roach Baits are designed with a low profile, which allows you to place the baits wherever insects are present. You can place them under appliances, below sinks, behind commodes or beside trash cans.