This is a A-806-3522 Round Bore Implement Yoke (Double Keyway & Set Screw) PN: 806-3522Main Description As Following : A-806-3522 Round Bore Implement Yoke (Double Keyway & Set Screw) PN: 806-3522 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. 1-3/8" Round bore with 5/16" & 3/8" double keyway. Original Weasler part. Bore: 1 3/8" Double Keyway: 5/16" & 3/8"