This is a A-800-0615 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-0615Main Description As Following : A-800-0615 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-0615 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 : 6 Series Implement Yoke, 15/16" round bore and 1/4" standard keyway and set screw. Original Weasler part. Bore: 15/16" Standard Keyway: 1/4"