This authentic manufacturer-sourced component is specially designed for Murray, Snapper and Simplicity lawn mowers. It is an identical replacement for a missing or a damaged hex nut that was installed on a new unit. Check the diagrams for your specific model for the exact location and the correct application of this hardware. Keep in mind...Read more this high-quality product is made of durable metal and is sold as an individual item. A wrench will be needed to secure or remove it.