The McCormick 3661265M91 is a genuine OEM switch designed for a wide range of McCormick, Massey Ferguson, Landini, and Valtra agricultural tractors. This essential electrical component ensures reliable operation across various machine functions, including starting, lighting, or other control systems. Manufactured to original equipment specifications, it guarantees precise fit and optimal performance. Refer to your machine's parts catalog for specific application details and placement to ensure correct fitment.