Snapper 1685167 is an idler arm stop kit designed for use on Snapper six-speed and shuttle tractors, as well as hydro tractors. It includes an idler arm stop, lockwasher, hex nut, and capscrew. The idler arm stop helps to prevent the mower deck from moving too far forward or backward, which can damage the mower deck or the tractor. It is easy to install and can be adjusted to fit the specific needs of your tractor and mower deck. With the Snapper 1685167 idler arm stop kit, you can be sure that your mower deck will be properly positioned and will operate safely and efficiently.