As bells, this is also a percussion instrument, but unlike the bells, the sound of bells weak, delicate, transparent.
The bells are a set of metal plates of different sizes, mounted on wooden blocks. Plates are like keys on a piano. Play them with sticks or mallets.
Sometimes the bells have a keyboard, through which the extracted sound.
Composers use this tool in special cases. Delibes, for example, in the Opera "Lakme" cast bells in the accompaniment arias of the heroine, where she sings about the ringing of the magic bell. Rimsky-Korsakov the Golden Cockerel" and puts them in order to give the music an extraordinary, fantastic flavor.