...fake cheese looking trigger plate. It's wider and trips easier than the narrow metal trigger. Years ago we rented a house that had a terrible mouse problem and these traps worked the best with a little chunky peanut butter on it. It had a really high success rate with very few misses. I would set my traps at night before going to bed. Before I'd finished saying my prayers they were going off *snap!* *snap!* *snap!*