The Fella 123297 Gauge Key is an original equipment manufacturer (OEM) part specifically designed for Fella drum mowers. This essential tool facilitates accurate setting and adjustment of the cutting height, which is crucial for optimal performance and uniform crop cutting. Manufactured to Fella's precise specifications, this gauge key guarantees compatibility and durability for various models, including the SM 270, SM 320, SM 350, SM 400, SM 470, and SM 500 series drum mowers. With a length of 95 mm, width of 51 mm, height of 10 mm, and a weight of 0.12 kg, it is a compact and vital component for maintaining your Fella machinery.