This Auction is for a stainless steel extension / adapter. 
(5/16"-24 Male by 5/16"-24 Male)

Stock Diameter is 5/16" 17-4 Stainless steel, This extension is typically used on a Pole spear, but it can be used for other applications as well.

12 inches long with 0.6 inches of thread length on each side of rod. 

• If not satisfied, feel free to return for refund