This is a A-800-0613 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-0613Main Description As Following : A-800-0613 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-0613 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 1000 Series, Weasler Domestic: 6 SERIES, Driveline > Yokes, Weasler Domestic: 1000 Series, Weasler Domestic: 6 SERIES Associated Items : New Also This is An Aftermarket Product And : Implement Yoke with round bore, keyway and set screw. 13/16" round bore with 3/16" standard keyway. Set Screw Hole Located In Gap Original Weasler part. Bore: 13/16" Standard Keyway: 3/16"