THIS TOOL IS DESIGNED TO USE ON CHRYSLER PRODUCTS EQUIPED WITH 9 1/4" 8 1/4 7 1/4  REAR ENDS. THE HEX NUT ON ONE END FITS THE ADJUSTING NUT TO ADJUST THE BACKLASH AND BEARING PRE LOAD USE WITH 1/2" DRIVE RATCHET OR PULL HANDLE. NOT FOR USE WITH IMPACT WRENCH.THIS TOOL IS ROUND TUBING TO PREVENT DAMAGE TO BEARINGS. 32" LONG  THESE TOOLS WERE DESIGNED AND PRODUCED IN SOUTH LOUISIANA, USA. 

ANY QUESTION CONTACT ME THROUGH EBAY THANKS EARL ZIMMER