I had to use a considerable amount of carpenters glue.  The embedded nuts in the arms that receive the bolts included were never seated well in the wood and would just spin.  It made what _SHOULD_ have been an easy install a cumbersome process at my woodworking bench to get past the factory defects.  I would have returned it, but after the box is opened, there is so much styrofoam and dozens of cardboard pieces, that I would have never got it back in the box.  I had the time and tools to repair the defective chair, so rather I am just giving 3 stars as a review.  ##NOTE that this happened only to ONE of the 6 chairs that I purchased.  The other five that were the same model did not have the defective parts.