The biggest highlight of this new product is that it works on a worn driveshaft. The collar extends well beyond the typical wear area on the shaft as shown in the second photo and therefore allows it to serve as a "repair" over the worn area of the shaft. The ability to work on a worn shaft will save customers the time and expense associated with replacing the driveshaft. The bearings being used are from the quality German bearing company FAG. 

For those that have new shafts or unworn shafts this new bearing is another option over the driveshaft saver. The savers have been proven to work well, but only on a non worn shaft. I will continue to offer them as they are less work to install. In my experiences, it is quite rare for one to remove the caliper and not find wear on the shaft. If you have not pulled your sled apart to inspect prior to ordering, I would suggest ordering the bearing over the expander to ensure you can fix your issue. 

Bearings ship with the collar installed. Replacement bearings will be available for purchase as well. Retail for the assembly is $160.