Tin whistle
In recent years a number of instrument builders have started lines of "high-end," hand-made whistles, which can cost hundreds of dollars US each — expensive in comparison to cheap whistles, but nevertheless cheaper than most other instruments. These companies are typically either a single individual or a very small group of craftsmen who work closely together. The instruments are distinguished from the inexpensive whistles in that each whistle is individually manufactured and "voiced" by a skilled person rather than made in a factory.
Low whistle
The low whistle, or concert whistle, is a variation of the traditional tin whistle/pennywhistle, distinguished by its lower pitch and larger size. It is most closely associated with the performances of British and Irish artists such as Finbar Furey and his son Martin Furey, Old Blind Dogs, Michael McGoldrick, "Riverdance", Lunasa and Davy Spillane, and is increasingly accepted as a feature of Celtic music. The low whistle is often used for the playing of airs and slow melodies due to its haunting and delicate sound. However, it is also becoming used more often for the playing of Irish and British jigs, reels and hornpipes, it being easier to produce some ornamentation on the whistle, due to the size of the finger holes.