Honestly one of the worst products I've had to assemble especially for the price tag. Does not come with instructions and is poorly designed, appears to be missing a rubber washer between the polls and back plate. I noticed the poll ends had very sharp edge ends which I filed smooth, as you can see from photo upon tightening these edges remove the chrome from back plate exposing brass beneath. I improvised and found six HOLDTITE FLAT TAP WASHERS ½" fitting between.