www.metalinmotionshop.com Metal in Motion based in Lenoir City TN, shows you the concept of testing a riding mower key switch. This key switch is off of a Craftsman riding mower, but can also be found on your Murrays, Simplicitys and many of the older or lower end riding mowers. To learn how to test lawn mower safety switches clink link below: http://youtu.be/Xi3p465MN1E