The McCormick 4115R815 is a genuine OEM Power Take-Off (PTO) shaft designed for a wide range of McCormick X-series agricultural tractors. This essential component ensures efficient and reliable power transmission from the tractor's engine to various implements. Engineered to meet original equipment specifications, it provides durability and optimal performance for models including the X4.20, X4.30, X4.40, X4.50, X4.60, X5.20, X5.30, X5.40, X5.50, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680.