Love the style of these chairs that replaced some ugly wooden chairs at my round dining room table.  The construction is comprised of metal screws that bolt the legs onto the seat of the chair.  The problem I have is that the screws come loose over time, and I have to get out my hex keys, turn the chair over, and tighten them up over and over again.  It's a drag, but I do love the design of the chairs.  They do look great.