Do you know that extraneous sounds can distract your dog from his work? That's why it is necessary to imitate possible noise while training process. In such a way German-Shepherd will get used to follow commands in any situation, even in extreme circumstances.
This stick is made of ecologically clean bamboo, natural material. It is intended to make noise. Note, it shouldn't be used for contact with your dog (in no way for punishing or biting)!
This supply has handle that is covered with a tape. It allows to hold the stick firmly and helps to make more noise.
Take a look at training stick in 3D