Sparex source: https://us.sparex.com/weasler-pto-yoke-keyed-yoke-u-j-size-1-1-4-x-3-7-32-bore-1-3-8-keyway-ins-5-16-128428.html Product: Weasler PTO Yoke - Keyed Yoke (u/j Size 1 1/4'' X 3 7/32'') Bore Ø 1-3/8'', Keyway Ins: 5/16'' - Sparex S.128428 SKU: S.128428 Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.