To put them together we used a rechargeable drill with a hex head and a very small socket wrench. With these tools you can put one chair together in a half hour. 
We have a travel trailer set up in an RV park in Northern AZ for the summer. Our neighbors all love them. Real attention grabber in the park. Fits well with my other decor: turquoise pillows and a red small table between the chairs. Summer relaxation at its best.