Fine modern bows used to play string instruments of the violin family -LRB- the violin , viola , cello and double bass -RRB- are usually made of pernambuco wood from LOCATION@1 and are strung with horsehair .

It is used to pull across the strings of a string instrument such as a violin , viola , cello or double bass . Bow construction The wood used for good quality bows is usually pernambuco wood from LOCATION@1 .
