The McCormick 6660507A1 is a genuine OEM Power Take-Off (PTO) shaft designed for various McCormick CX and MC series agricultural tractors. This critical component ensures efficient and reliable power transmission from the tractor's engine to implements. It is a direct replacement part, guaranteeing proper fit and optimal performance for models including CX100, CX105, CX110, CX50, CX60, CX70, CX75, CX80, CX85, CX90, CX95, MC100, MC105, MC115, MC120, MC130, MC135, MC80, MC90, and MC95.