Heavy Duty PTO Over Running Coupler/PTO Clutch 1-1/8"6 Spline x 1-3/8" 6 Spline $129.05 Brand Heavy Duty Type pto shaft Model Year several tractor clutch Model several MPN A-51A110 Equipment Type Tractor Equipment Make several Part Type PTO Clutch condition New This is a Brand New heavy duty PTO over running clutch assembly.This clutch is a 6 spline with 1 1/8 female by 1 3/8 male adaptor 6 Spline.This has a quick disconnect.75 PTO HP MAXThanks For Your Business!!A-51a110