The John Deere PF12174 is an authentic OEM knob designed for the steering wheel release mechanism, specifically for ATU (AutoTrac Universal) systems. This crucial component ensures proper adjustment and locking of the steering wheel position in a wide range of John Deere agricultural and construction equipment, including M, R, RT, RX Series Tractors, S, T, W Series Combines, 8000/9000 Series Forage Harvesters, R Series Sprayers, and CP/CS Series Cotton Pickers. Made to John Deere's exacting standards, it guarantees durability and precise fitment, maintaining the functionality of the steering system.