Aftermarket Series 4 metric Implement Yoke with 1-1/4" Bore and a 3/8" shear bolt hole and a 6mm set screw. Holes for 27mm (1.06") bearing caps with retaining ring grooves 74.6mm (2.93") apart, a 1-1/4" smooth bore with a 3/8"shear bolt hole and a set 6mm screw. The set screw is designed to lock the PTO one the implement input shaft by extending into the V-groove at the tip of the shaft. Please see exploded view for diagram of where the set screw lock into. This yoke will fit many different series 4 shafts from Eurocardan Bondioli Pavesi, Comer, RPM, Binacci and most China Shafts. We also have the 1004020 cross kits to fit this yoke available in our store. Code 68178 We sell many replacement parts for the most manufacturers rotary cutters. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check back often. We stock a wide variety of replacement parts for Agricultural Equipment please contact us if you have any questions or if you would like more information.