A trip to a big box hardware store should provide you with some ideas. A couple of short pieces of 1 inch iron pipe maybe. You could get a piece 8 inches long (there abouts) drill a couple of holes near one end, one a inch above the other. And then use long screws to go thru the holes into the wood end. That would give you some rough and ready sockets. Some long 1/4 inch machine bolts that went all the way thru the wood end, and with some big washers, would be a bit stronger.
If you want pretty, cut off the screw threads, file or grind the ends so they are smooth and beveled, and apply some nice paint.