JT Eaton 4 lb. Peanut Butter Flavor Bait Blocks. These resealable pail blocks are made with peanut butter flavor to attract and eliminate mice and rats. The active ingredient, .005 Diphacinone, efficiently kills smaller rodents and pests a few days after feeding. This product includes (64) packs of 1 ounce Rodenticide blocks in a tamper evident resealable pail. The pail size is perfect for garages or basements to keep those rodents away. Backed by a 1-year limited warranty.