This knife is a heavy-duty cutting component for the combine header. It mounts at the cutting bar and interacts with the reciprocating knife drive to sever crop material. The three mounting holes align with the knife head and ledger plate assembly. Wear on the cutting edge results in ragged stubble and increased power draw from the drive system. The manufacturer machines this replacement to match the original hole spacing and thickness, which keeps the shear clearance with the ledger plate within specification. On installation, verify that the knife sections are not bent and that the hold-down clips are adjusted to maintain contact.