The McCormick 6708944A1 is a genuine OEM PTO shaft designed for various McCormick X-series agricultural tractors. This essential power take-off component ensures reliable power transmission from the tractor's engine to implements. It is compatible with McCormick X4, X5, X6, X7, and X8 tractor models, including 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.