The John Deere AM123420 is a genuine OEM lift arm designed for specific John Deere lawn and garden tractor models. This essential component plays a critical role in the mower deck lift system, allowing for accurate and consistent adjustment of cutting height. Constructed from durable materials, the AM123420 lift arm ensures reliable performance and longevity, maintaining the integrity of your tractor's mowing capabilities. Replace worn or damaged lift arms with this authentic John Deere part to restore optimal functionality and precise control over your mower deck.