This listing is for one replacement high quality Italian made Series 6 Heavy Duty3-Point mounted Roto- Cultivator / Tiller PTO shaft with clutch! Series 6metric spec tiller PTO shaft measures 39.86" overall length when closed , features a 1-3/8" 6 spline yoke on the tractor end with a metal quick slide collar and 1-3/8" X 6 spline4 friction disc clutch on the implement end that measures 8" diameter. This is a Heavy Duty slip clutch used on 80" or larger 3-point hitch roto-cultivators. Specifications Series 6 Metric 1-3/8" with metal slide collar X 6 Spline yoke Tractor End 1-3/8" with 6 Spline 4 Disc Slip Clutch Implement End 8" Diameter Clutch Complete with Shielding Made in Italy Replaceable Cross and Bearing Kits Replaceable friction disc