This is a A-800-1418 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-1418Main Description As Following : A-800-1418 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-1418 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 14 Series, Driveline > Yokes, Weasler Domestic: 14 Series Associated Items : New Also This is An Aftermarket Product And : 14 Series Implement Yoke. 1-1/8" round bore with 1/4" standard keyway and set screw. Original Weasler part. Bore: 1 1/8" Standard Keyway: 1/4"