We purchased these chairs because it was what I wanted in my kitchen, swivel, tilt back and on casters.  The chairs look nice but we had problems with all 5 chairs. It is just my husband and I, but the backs broke on two of them when we leaned back, they creek, squeal and crack with any type of movement.  My husband has taken each chair apart an worked on them, replace wood that was very brittle, screws and brackets to keep the chairs from breaking apart.  He had filed down the center post and oiled it to try to keep them from making noises when you set in them.  
We called Wayfair and they were helpful with our problem, but I would recommend you not to purchase these chairs.