Modern soccer cleats look like any other shoes, but they have pointed spikes at their bottom. These spikes are called studs (or cleats), and they are present to provide grip on the playing ground. Most professional soccer is played on outdoor grass pitches, so it becomes imperative for players to maintain their grip while running. These studs can be made of plastic or metal. Furthermore, these studs can be permanently attached, or in some cases, they are detachable. Some forms of soccer are also played on indoor hard surfaces. Thus, indoor soccer cleats might not even have studs on their soles.