Heavy Duty Slip Clutch PTO Shaft for Most 5' and 6' Rotary Mowers Heavy Duty Slip Clutch PTO Shaft for Most 5' and 6' Rotary Mowers 1-3/8" 6 SPLINE Tractor End, 1-3/8" 6 spline implement end with 4 disc slip clutch Min. 47.1" Max 71" Max Working Length 63" with Clutch