Contrac, a single-feeding anticoagulant bait containing Bromadiolone, is excellent for controlling mice and rats. This and all the other Blox baits have a hole through the centre to allow baits to be secured into bait stations via spikes or rod. Contrac is less toxic to non-target animals in both primary and secondary poisoning situations than other single-feeding anticoagulants. MAF approved (category B and C) for use in dairy factories and category C in fish. Also available in an 8kg Pail which contains approximately 285 x 28gm blox baits.