This knife is a replacement blade for the straw chopper assembly on a forage harvester. It is mounted on the chopper rotor, where its cutting edge interacts with the stationary counter-knife to reduce crop residue length. A dull or damaged knife increases the power draw of the rotor and produces an inconsistent chop length, which can affect residue spread and subsequent soil incorporation. The manufacturer machines this blade to the original profile and hole geometry so it aligns with the mounting holes on the rotor without requiring modification. When replacing, inspect the counter-knife for wear and tighten the mounting bolts to the specified torque.