There are two kinds of Binioù found in Brittany: the binioù kozh (kozh means "old" in Breton) and the binioù bras (bras means "big"), sometimes also called pib-veur.
The binioù bras is essentially the same as the Scottish great Highland bagpipe; sets are manufactured by Breton makers or imported from Scotland or elsewhere.
The binioù kozh has a one octave scale, and is very high-pitched; its lowest note is the same pitch as the highest on the great Highland bagpipe. It has a single drone two octaves below the tonic. Traditionally it is played in duet with the bombarde, a shawm which sounds an octave below the binioù chanter, for Breton folk dancing. The binioù bras is the one heard as part of a bagad.
It is typically suggested by locals that the binioù originates originally from KernVeur (Cornwall in Breton). But as traditions in the country have died (as the mother tongue - Cornish), so it seems has the role of the Binioù.