First,  I am and have been a Mechanical Engineer for 50 years. First,  the set is worth Worth the sale price but the list price is greatly overpriced,  second, the left and right arms for the chairs and loveseat are identical.   On both the left and right arms the same nut has been welded in at the wrong angle causing the bolt to cross thead. Instructions say to install left and right arms to back before installing bottom.  Won't  work.  Install bottom to back, leave all b9lts loose untill everything is installed.  One bolt on each arm will cross thread but if you put a # 6 mm not on the bolt you can chread the bolt enough to hold and then tighten the nut to finish.  Overall i cannot recommend this set to anyone without experience and skills dealing with things that just don't  fit.