The chair assembly was easy, although the directions were a bit confusing. There are no predrilled holes or allen wrenches. You literally screw directly into the back of the chair. The confusing bit was that the directions were only pictures, and included instructions for attaching a rack at the bottom of the legs.  I thought at first parts were missing, but then realized that must be a different model, but there isn't any indication of that on the instructions. I figured it out quick enough, though.