This is a A-D448721 Implement Clamp Yoke PN: D448721Main Description As Following : A-D448721 Implement Clamp Yoke P.N: D448721 Single bolt clamp yoke, includes the bolt.Bore: 1 3/8" - 21 spline Replaces: PM807-4421 JOHN DEERE , 807-4421 DRIVE-LINE , Crossed From: W8074421DS CASE-IH Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 44 Series, Driveline > Yokes, Weasler Domestic: 44 Series Associated Items : New Also This is An Aftermarket Product And : Single bolt clamp yoke, includes the bolt. Genuine alternative to original part. Genuine alternative to original part. Bore: 1 3/8" - 21 spline