Metal bar stools are manufactured with aluminum, steel or iron. In styles from traditional to contemporary, metal kitchen bar stools are available with or without arms and with or without backs. The seats of a metal bar stool are 30 inches high. That is the measurement from the floor to the seat, which is known as 'bar height'. Some metal bar height stools are metal swivel bar stools. A metal swivel bar stool has a seat that rotates or swivels, allowing ease of sitting in the stool at a counter, table or bar.