A wrench includes a handle having an engaging end at one end of the handle and a sleeve is slidably mounted to the handle. Consequently, rescan can be executed for all the receiving directions of the smart antenna by performing a simple manipulation. 0 atomic percent and at least one kind of W, Mo, V, Zr, Nb and Cr in a total amount of 3. A bridge for a stringed musical instrument, which bridge includes first and second parts which are pivotable relative to one another.