Irish Uilleann pipe Half set Seasoned Rosewood Chanter main stocks with drone, Rosewood bellows leather strapped and Bag black velvet sliver fringe

A half set is the next stage up from a practice set. As with other forms of bagpipes, uilleann pipes use "drones", which are most commonly three pipes accompanying the melody of the chanter with a constant background tonic note.

The pipes are generally equipped with three drones: the tenor drone, as the highest sounding pipe, which is pitched the same as the lowest note of the chanter; the baritone drone pitched one octave below that; and the bass drone, as the lowest sounding pipe, two octaves below the bottom note of the chanter.