This is a A-857-3520 Clamp Implement Yoke (w/ Keyway) PN: 857-3520Main Description As Following : A-857-3520 Clamp Implement Yoke (w/ Keyway) PN: 857-3520 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic 50 CV: 35 Series, Driveline > Yokes, Weasler Domestic 50 CV: 35 Series Associated Items : New Also This is An Aftermarket Product And : Original Weasler part. Bore: 1 1/4" Series: 35 w/ 1/4" Keyway