All States Ag Parts PTO Adapter Quick Release Collar/Coupler 1-3/8" 6 Spline Female 6 Spline Male PA09 PA-09 Replaces 3-Point Hitch & Ag Hardware OEM nos PA09, PA-09 1-3/8" - 6 spline female x 1-3/8" - 6 spline male For tractors up to 75 h.p. Extends PTO 4-1/2" Overall Length: 7.00"