This is a A-10001-1033 Implement Yoke, 1" Round Bore, 1/4" Keyway, W/ Set Screw PN: 10001-1033Main Description As Following : A-10001-1033 Implement Yoke, 1" Round Bore, 1/4" Keyway, W/ Set Screw PN: 10001-1033 Found in Section & Models : Driveline > Driveline Components, Neapco DOMESTIC: 1000 SERIES, Driveline > Yokes, Neapco DOMESTIC: 1000 SERIES Associated Items : New Also This is An Aftermarket Product And : 1000 Series Implement Yoke. 1" Round bore with 1/4" Keyway and set screw. Yoke centerline is 2-1/2". Weasler alternative to original part. Bore: 1" Centerline: 2 1/2" Replaces: Neapco Part No: 10-4573 Single Keyway: 1/4"