This purchase includes a replacement ignition switch and key for use with lawn tractors. The ignition switch connects to an electric starter motor, which allows users to simply turn the key to get the machine started. It is one of the most important components of the tractor. Without a properly functioning ignition switch, the tractor will not start at all. The ignition switch could fail for a range of reasons. In some cases, it might be due to a mechanical or electrical issue that will require replacement. Other times, it could become damaged and no longer allow the key to fit properly. When there are issues with the ignition switch, owners should replace it immediately. This is a genuine OEM ignition switch and key replacement that is identical to the one that came in the machine. This kit includes the switch and its related components, along with the key. It can work with more than 150 different types of lawn tractors and small engines. Compatible brands include Briggs & Stratton, Craftsman, Murray, Snapper, MTD, and Simplicity.