The vole trap is designed as an cruelty free alternative to poison and pesticides due to the lack of chemicals it is safe to use in any location and around your garden proven to be effective for more than 50 years the device housing is completely made of aluminum making it rust free a mechanical shot is used to stun the animal as it exits its hole or pathway after which a high pressure gas is fired off which kills the vole instantly before it can feel pain approved by the national metrol