Claves

Claves (Spanish word: second e is sounded) are percussion instruments. They are small wooden sticks made of tropical hardwood. They are used in pairs. They are traditionally heard in Cuban music, e.g. salsa. 
In Cuban music they often repeat a special rhythm called "clave" (pronounce: "CLAH-ve").
The usual way of playing claves is to hold one clave lightly between the thumb and the fingertips with the palm of the hand facing upwards, or to cradle the clave in the hand. The other, held with the other hand, hits it.