Fits all bait stations and must be used in a tamper-resistant bait station by law. Rodent bait stays fresh in damp or wet weather so can be used in indoor or outdoor situations. Position baited stations in cupboards, attics, basements, lofts, sheds, garages, alleys, caravans, etc. Bait blocks are created to be highly attractive to rodents, increasing effectiveness. Contains Difenacoum.