This is a A-800-0614 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-0614Main Description As Following : A-800-0614 Round Bore Implement Yoke (w/ Keyway & Set Screw) PN: 800-0614 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 : Original Weasler part. Bore: 7/8" Centerline To End: 2-1/2" Keyway: 3/16"