This is a A-806-0618 Round Bore Implement Yoke (w/ Double Keyway & Set Screw) PN: 806-0618Main Description As Following : A-806-0618 Round Bore Implement Yoke (w/ Double Keyway & Set Screw) PN: 806-0618 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 6 SERIES, Driveline > Yokes, Weasler Domestic: 6 SERIES Associated Items : New Also This is An Aftermarket Product And : Implement yoke with round bore. Yoke has 1-1/8" round bore with 1/4" standard keyway and set screw. Original Weasler part. Bore: 1 1/8" Centerline To End: 2-1/2" Double Keyway: 1/4" & 5/16" Replaces: Neapco Part No: 16-6216