These are so badly designed I dont know what to say. The locking screws are built so that the key can only tighten them a 1/4 turn at a time. The wooden screws are put in from the bottom of the chair and penetrate the cushion. The screws fall out about once a week on average. The wooden dowels to align the seat dont fit.....I dont mean they are a tight fit which they should be, they just dont fit and if by some miracle you get them in with a hammer, they are too long and have to be filled down. We bought these chairs about 4 weeks ago and they are already heading for the tip. Waste of money and effort.