This bent steel rod struck by a small metal rod is used in the final movement of Beethoven's Ninth
[DOC] [TLE] Ludwig van Beethoven - Timeline | Facebook [PAR] [16] This instrument has a braceless back and a soundboard which was 
positioned below the keys meaning that long metal rods pulled on the levers 
resulting in... [DOC] [TLE] Triangle (musical instrument) - Wikipedia [PAR] The triangle is an idiophone type of musical instrument in the percussion family.