Bait Blocks are an effective rat and mouse killer that works even when exposed to the elements- Appropriate for both indoor and outdoor use, JT Eaton Bait Blocks are formulated with a blend of natural foods and grains that are preferred by both rats and mice- Therefore, there is no problem with bait shyness rodents will return to the bait again and again- Bait Blocks are accepted for use in federally inspected food plants, and meet government labeling requirements-- 9 lb- pail of 72 two ounce blocks-- Center hole to easily secure bait-- Mold and moisture resistant-- Kills Norway rats, roof rats and house mice in wet or dry areas