Product Description: Rotary Mower Driveline Assembly, size 5. Driveline minimum C-to-C is 34" (867 mm), maximum C-to-Clength is 51" (1300 mm), total collapsed length is 42" (1067 mm). Tractor ends: 1-3/8" 6 Spline andimplement ends are 1-3/8" round bore with 1/2" pin hole. Driveline rated as category 4 (47 hp). Fits Bondioli & Pavesi applications. It may be necessary to cut this driveline to length. Verify the length by ensuring that sufficientoverlap of the drive tubes exists in all working positions without the possibility of bottoming out. Use a grade 2 shear bolt 1/2" x 3 1/2". The use of a harder grade bolt will void the warranty.