I got four of these bad boys and I reuse them. watch out for how strong the spring is-keep away from small dogs and pets-could break a leg-but wow!! I have put them out for now for two days and have killed two 8 inch Norway rats, one mouse, and three smaller rats of unknown species. one trap even killed two rodents at the same time. I bated them with peanut butter, dog food and a little piece of sliced cheese.