Sparex source: https://us.sparex.com/pto-yoke-quick-release-u-j-size-1-5-16-x-4-size-1-3-8-6-spline-128170.html Product: PTO Yoke - Quick Release (u/j Size: 1 5/16'' X 4'') Size: 1-3/8''-6 Spline - Sparex S.128170 SKU: S.128170 Listing note: Series Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.