A-AH213011-AI Sickle; Head End Section, FineOne New Aftermarket Replacement Sickle Head End Section, Fine Fits John Deere 600R Series Cutting Platform This fine serrated sickle head end section (knife assembly, head end fine) Fits John Deere (Fits JD) 600R Series cutting platform headers. The head end section is a critical wear component of the cutterbar knife assembly, providing clean crop cutting at the outer drive end of the sickle bar. Fine serrated sections are recommended for varying crop