Prevent ants from coming inside by stopping them outside with our TERRO Perimeter Ant Bait Plus Granular! At TERRO we value baiting ants as it is ideally the best way to remove the entire colony vs. just a few ants. This granular bait can be applied around the home for perimeter protection against a large variety of ants. Get protection for up to 4 weeks with this long-lasting product.