This is a A-800-7732 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-7732Main Description As Following : A-800-7732 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-7732 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 77 Series, Driveline > Yokes, Weasler Domestic: 77 Series Associated Items : New Also This is An Aftermarket Product And : Original Weasler part. Bore: 2" Rd w/ Keyway & Set Screw Keyway: 1/2"