The Big Cheese Ultra Power Block Bait Mouse Killer Kit features a twin pack of reusable, refillable mouse bait stations, each containing 5 x 20g poison bait blocks. These bait blocks, which contain brodifacoum, are fast-acting and effective at killing mice in just one feed. The kit includes an on-pack satisfaction guarantee. The bait stations are designed to fit discreetly in corners of your home, with two-way entry and a translucent inspection chamber that allows you to see when the bait needs replenishing. This kit is suitable for use indoors in homes and lofts, as well as outdoors around structures like garden sheds, garages, and outbuildings. The stations have a tamper-resistant design that protects children and pets from accidental contact with bait.