Our Rodent Detector Cards help you think like a rat. To be a successful trapper, it’s really important that you assess (don’t guess), where to position your A24 trap. The detector cards show you where rats in your area feel safe to eat. That’s the place you need to install your trap, even though it might be somewhere different from where you’ve seen or heard them. The cards contain our long-life lure for rats which we know they find super tasty. By checking out the gnaw marks on the cards after a few nights, you will know which pests are doing the munching and exactly where to position your trap.