This is a A-800-1224 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-1224Main Description As Following : A-800-1224 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-1224 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 : 1200 Series Slip Yoke. 1-1/2" Round bore with 3/8" standard keyway. Original Weasler part. Bore: 1 1/2" Replaces: Neapco Part No: 12-1175 Standard Keyway: 3/8"