Whether you are rolling or playing notes, you can now have immense dynamic control from any triangle in a split second simply by jumping from one beater head to the other. In particular, this beater enables you to play or roll and achieve a true forte/piano dynamic change effortlessly. Dynamic changes in either direction…loud to soft and soft to loud are very easy. The dual heads consist of a 4.75 mm diameter front head and a rear head size of 7.75 mm diameter stacked one in front of the other. This, combined with the length 11.5 in. of the carbon fiber shaft required some thinking outside the box that turned out to be very worthwhile. The longer length also contributes to a unique feel in playing and rolling and are substantially longer than other Freer Percussion triangle beaters. Try these on Dvorak New World Symphony and you will see how musically effective, clear and quick speaking these are. Also excellent for Brahms 4.