This is absolutely the worst product I have ever ordered from Wayfair.  Not only where adequate directions not given (dont tighten all the bolts until every piece is connected), the quality of the connecting screws was inferior.  The metal was soft, easily stripped at both the thread and the head. And they were not self centered.  Even after trying to loosely screw in by hand, I have several ruined by cross threading that I ran out of screws to even finish 4 chairs and 2 out of the 6 were ruined. I hope Wayfair discontinues any sales from this company until they get American made hardware