This is a A-801-3506 Spline Bore Implement Yoke (w/ Pin Hole) PN: 801-3506Main Description As Following : A-801-3506 Spline Bore Implement Yoke (w/ Pin Hole) PN: 801-3506 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 : 35 Series implement yoke, 1-3/8" 6 Spline with 21/64" Pin Hole. For 35 Series Original Weasler part. Bore: 1 3/8" - 6 Spl. Pin Hole: 21/64"