The height adjustment assembly is a replacement part that is designed for use in select walk-behind lawn mowers. The adjustment assembly includes nine total height adjustments and installs on the front wheel of the unit to allow the user to adjust the wheel height and cutting height before each use. The metal height adjustment assembly is exposed to constant impacts and repetitive motion, which can lead to damage or wear. If the height adjustment fails, the mower may be inoperable until the part is replaced. This genuine OEM part will provide the appropriate replacement for select models from MTD, as well as those from Troy-Bilt, Bolens, Yard Machines, Yard Man, Husky, and Cub Cadet. It is sold as an individual assembly and the hardware required will be sold separately. This is an identical replacement for the right side of the mower. It is important to wear gloves when working on the mower deck and allow the unit to cool completely for safety. The height adjuster will take a wrench or socket set and screwdrivers to install.