This is a A-102-5521 Quick Disconnect Tractor Yoke PN: 102-5521Main Description As Following : A-102-5521 Quick Disconnect Tractor Yoke PN: 102-5521 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 55 Series, Driveline > Yokes, Weasler Domestic: 55 Series Associated Items : A-13002021 Also This is An Aftermarket Product And : Original Weasler part. Bore: 1 3/8" - 21 Spl.