Direct replacement for a much needed part! We are very pleased to offer this new product! This is the complete spindle assembly for the Bush Hog RDTH84 (7') model finishing/grooming mowers. This will replace the Bush Hog part number 50040718. We also are including the blade bar (50031815) in case you need that as well. 18 pounds The Bush Hog brand spindle & bar lists for almost $700. Save yourself a pile of money for the same quality. We also carry the spindle for the 4',5' & 6' models.