Contrac Rodent Place Pacs Bromadiolone 0.005% Contrac Pellet Place Pacs is for use in residential homes, agricultural buildings, garage, attic, sheds, yards, industrial and commercial buildings, food processing facilities, trash/dumpster areas, docks and port terminal buildings and related structures. Burrow baiting is prohibited with this product. Contrac Blox is a rodenticide containing bromadiolone and is a single feed bait that kills both rats and mice indoors and outdoors.