This listing is for one replacement World Agritech Corp gearbox input shaft, fits 60hp gearboxes used on some of the IM502 and IM602 and Super 8 rotary cutters. Many of these gearbox had the WAC logo cast into the side of the gearbox. Standard 1-3/8" X 6 spline shaft, Please contact us if you are not sure this will fit your gearbox and we will check it out you.