Screw Table is a simple, honest design, inspired by materials and processes of the industrial revolution. Its rotating top on a threaded steel pole allows for adjustable height, while being sturdy, durable, elegant and ideally suited for use both inside and outside. Features Process:The tripod base is made from sand cast iron. The process involves compacting sand into a casting box around a tool which is carefully removed by hand. Liquid iron is poured into the cavity to form the shape. Once solidified, it is machined steel thread and powder-coated black to finish.