These are a set of 4 plastic replacement drive hubs for your Clodbuster.  These are designed to allow for the use of EITHER the Clodbuster or TXT wheels.  These are a direct fit on your Clodbuster or Bullhead axles and accept the stock 12mm brass drive hex.  

Note:  These will not work on a TXT axle due to its longer length.  Use CPE-HUBTXT if using TXT outer axles.