This is a A-804-1214 Square Bore Implement Yoke (w/ Set Screw) PN: 804-1214Main Description As Following : A-804-1214 Square Bore Implement Yoke (w/ Set Screw) PN: 804-1214 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 12 Series, Driveline > Yokes, Weasler Domestic: 12 Series Associated Items : New Also This is An Aftermarket Product And : 12 Series Implement Yoke. 7/8" Square bore with set screw. Original Weasler part. Bore: 7/8" Replaces: Neapco Part No: 12-1170