The McCormick 6632103A1 Stirrup is an original equipment manufacturer (OEM) part designed as a footboard support for various McCormick X-series tractors. This essential component provides a secure step for operator access to the machinery. It is compatible with McCormick X4, X5, X6, and X7 series models, including specific variants such as X4.30, X4.35, X4.40, X4.45, X4.50, X5.35, X5.45, X5.55, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, and X7.680.