Pirastro Piranito Violin String is a steel core string and is considered to be the best strings for its value as they are robust and quite long lasting. Piranito tune up much better than many other soft strings and sound exceptionally well too. The robust nature and good sound from a soft string is owed to the steel core that makes it susceptible to atmosphere changes making it a better choice over other soft strings that are not so long living and are also expensive.
Professionals who use Pirastro Piranito claim it to be so soft that it is hard to realize that it is actually metal. Many violinists recommend Piranito for small instruments however since Piranito comes in different sizes, it is also beautifully used in medium sized instruments. Piranito is powerful and is ideal for instruments that require extended power. Many professional violin teachers prefer use of Pirastro Piranito.