This fire pit ring is great for DIY using and can be used in ground or above ground. Made of 2mm thick heavy duty steel with powder-coat surface, this fire pit ring is durable and sturdy enough to bear the test of time and weather. It's worth noting that our basin rings have an oversized diameter, 36 inch outside and 30 inch inside, so it is an ideal option to create warm atmosphere. Moreover, this fire pit ring is connected with screws, so that it is easy to assemble and disassemble. By the way, the edge of the fire pit is smooth for safe using. This thick steel ring provides you a great option to build your own fire pit in your backyard.