M802048 set-up bearing (one bearing). No return.
Set up bearings make it easier to do trial setups of ring and pinions because the press-fit of the bearings has been eliminated, which makes it easier to adjust shim thicknesses during a gear swap. These bearings should NEVER be run in-service and are for gear setups ONLY. Whether you do one gear swap or many of them, these bearings can save significant time and hassle.