I am installing this fire ring inside a brick surround to try to create a smokeless fire pit. To make this work I had to drill 1/2 inch holes around the flange side of the ring. This drilling gave me the opportunity to closely examine the material, thickness's and uniformity of this product. I found the steel to be of sufficient thickness and the pieces fit well together (If you have trouble getting the gaps to close in the flange, swap two of the pieces. They are designed to fit only one way.) The coating is uniform and solid. Overall I am very pleased with my purchase.