it might not be perfect, but it works well for me, and its really cheap for a pair of thick revolving DB handles. I got a threaded 3/4" pipe about 18" long or so, another pipe about 5-6 inches long that is 2 inches thick. I put the shorter, fatter pipe on top of the skinnier one, a bunch of standard plates on the remaining 6" either side of the shorter pipe and screw on an end cap to keep the plates secured. It works great as a revolving thick handle db.
Here is another video, I use this barbell with well over 300 lbs and it works fine, if you are lifting significantly more than that, invest in a good thick bar if you want one.