I made on from a piece of 1" black iron pipe. I threaded a sleeve on it very tight then welded it together and added an old 1/2" drive socket inside and welded it. Using my sawsall I cut away , from the open end of the sleeve, all but 4 "tits" that I measured very carefully and it works just fine! It took me about 1/2 an hour, and saved me the $55 they cost!!!