This is a A-100-0606 Spring-Lok Tractor Yoke PN: 100-0606Main Description As Following : A-100-0606 Spring-Lok Tractor Yoke PN: 100-0606 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 6 SERIES, Driveline > Yokes, Weasler Domestic: 6 SERIES Associated Items : A-13003100 Also This is An Aftermarket Product And : 16 HP @ 540 RPM. 30 HP @ 1000 RPM. Safety Shields can be cut to length. Original Weasler part. Bore: 1 3/8" - 6 Spl.