Violin
bows traditionally have their stick portions created from Pernambuco.
This is wood from the Brazilian timber tree, also known as brazilwood
or Pau-Brasil. Occasionally, student bows are created from fiberglass.
More modern designs may also be created from carbon-fiber.
The ends of violin bows are unique and distinct. The tip is also known
as the head. At the opposite end is the frog. This is also known as
the nut or heel. Between these two parts, a ribbon of horsehair is strung.
The frog ends of violin bows are used to adjust the hair. At this end,
a screw adjuster exists to either tighten or loosen the hair as necessary.
This end may also be decorated with two eyes that are made of shell.,
which may or may not have metal rings surrounding them.