This is a A-800-3524 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-3524Main Description As Following : A-800-3524 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-3524 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 35 Series, Driveline > Yokes, Weasler Domestic: 35 Series Associated Items : New Also This is An Aftermarket Product And : 35R Series implement yoke. 1-1/2" round bore with 3/8" standard keyway and set screw. For 35R Series Original Weasler part. Bore: 1 1/2" Standard Keyway: 3/8"