Our all products are incredibly durable and made to last Fire pit made from mild-steel and cast-iron and varying from 5mm to 1cm in thickness. The rusted cast-iron holes have no seam-welds or joints in design, thus making them reliable in structure and adverse to making potential weak spots due to rust. There's no extra care required to maintain the fire pits. On the second side, mild-steel fire pits or joints their design, thus making them reliable in structure to creating potential weak spots due to rust. There's also no extra care required.