This is a genuine McCormick 3657656M1 Power Take-Off (PTO) shaft, designed for reliable power transmission in agricultural machinery. Manufactured to OEM specifications, this PTO shaft ensures optimal performance and durability. It is a direct replacement part for various McCormick CX series, Case IH JX series, and New Holland TL series tractors. Key dimensions include an overall length of 540 mm, an outer diameter of 45 mm, and features 20 splines on one end and 21 splines on the other, with a total weight of 3.50 kg.