The Etude3 is a light weight thumb rest for clarinet and Oboe made out of durable plastics. The Etude enhances the freedom of playing. Faster and easier movement of the ring- and little finger and it prevents fatigue of the thumb and hand.
It gives your a sense control and of a firm "grip" on your instrument.
The Etude makes it possible to move the pressure point of the thumb rest to the first phalanx of the thumb to the space between the two joints. The lever momentum is much smaller at this point so the thumb can support the weight more easily.
Much of the energy used for supporting the weight then becomes available for handling the instrument.
And can be used to improve control and speed up paying technique.
The Ton kooiman thumb rests are supplied with a manual in the box.