This is a A-804-3519 Square Bore Implement Yoke (w/ Set Screw) PN: 804-3519Main Description As Following : A-804-3519 Square Bore Implement Yoke (w/ Set Screw) PN: 804-3519 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 35 Series, Driveline > Yokes, Weasler Domestic: 35 Series Associated Items : New Also This is An Aftermarket Product And : 35 Series implement yoke. 1-3/16" square bore with 13/32" drill thru hole. Original Weasler part. Bore: 1 3/16"