Metal Stone Faces follow the same concept as regular Stone Faces; the Stone Face acts as a Screw/Bolt to keep the Beyblade tightened together. However, it is, obviously, made of metal. It is octagonal in shape, rather than a hexagonal shape used in the previous HWS and 4D Systems. The Bolt also seems longer than its predecessor, most likely to deal with the occompaniment of new kinds of wheels.