Just One Bite EX Preloaded Bait Stations are disposable bait stations preloaded with a 0.5 oz. block of Just One Bite EX bait. Designed for in-home use. Low- profile design allows easy placement behind or under furniture. Kills Norway rats, roof rats and house mice. Rodents usually consume a lethal dose in just one feeding. Just One Bite EX contains bromethalin.