These are large and sturdy with a great swivel.  Very comfortable. 
The drawings on the back of the packing list showed which parts went where; but it would be helpful if they would also suggest a sequence for assembly.  Also if there was a larger picture showing which way the bolts should fit into the two sections of the swivel. We assembled the leg section first which was easier then tackled the chair and got it right.  Very happy with the result!