THIS LISTING IS FOR A LOT OF FIVE EXTENSION SHAFTS.  FOUR OF THE FIVE ARE PRETTY MUCH IDENTICAL.  THE OTHER EXTENSION SHAFT HAS A SPLINED OD.  INFORMATION BELOW"

INTERNAL THREAD = 7/16"-20

LARGE OD = 0.75"

SMALL OD = 0.625" (ONE IS 0.625" SPLINED OD)

EXTERNAL THREADED END = 1/2"-20

  

IF YOU HAVE ANY QUESTION, PLEASE MESSAGE ME.

PS:  I DO NOT KNOW HOW SHIPPING IS GOING TO BE CALCULATED.  I WAS ABLE TO ESTIMATE SHIPPING COST BUT WITH NEW SYSTEM I CANNOT.  I WILL REFUND ANY SHIPPING CHARGES MORE THAN ACTUAL SHIPPING COST.