(Hacco) All-weather bait block is paraffinized to resist water, snow, high humidity and sun. Can be placed in sewers and other damp environments without the fear of breaking down and going to waste. Each chunk has a center for easy nailing or fastening. Cykill Bait Packs are a pellet formula packaged in a paper pouch. Rodents eat through the packaging--no need to open the pouch. Use CyKill as part of a rotational baiting program to break the cycle of anticoagulant resistance. Fast acting, palatable formula provides a lethal dose after just one feeding. Both forms effective for rats or mice.