The Fendt 178100123100 PTO Knob is an authentic OEM replacement part designed for Fendt agricultural machinery. This knob allows for the selection of PTO speeds, specifically 540 and 750 RPM, providing operators with precise control over implements. Manufactured to Fendt's high standards, it ensures reliable performance and a perfect fit, maintaining the original functionality and aesthetics of the tractor's control panel. This genuine Fendt part is crucial for proper PTO operation and longevity.