Complete assembly required for these bar stools. They take a little while and I suggest using a good Allen wrench because the one provided will bend and can strip you bolt. There are no extra parts. Very sturdy when assembled. Cushions are soft. We are very happy with them we ended up buying 6 of them for our kitchen counters. They also have matching 30" bar stools and a High Top Pub table that finished the bar off the kitchen.