OMT Bearing Race and Seal Bush Driver Set 10 pcs Orion Motor Tech This OMT Bearing Race and Seal Bush Driver Set is a must-have for any mechanic or DIY enthusiast.Includes 10 pieces with driver disc outer diameters ranging from 39.5mm to 81mm. Comes with case to store everything in.Has been used but everything is in good working condition. Some pieces in this set do show wear from being used, which is shown in the photos up close.