Sefdrert 1 Piece Violin Bow Collimator Exercise Straighter Adjuster 3/4 4/4 Violin Bow Straight Bow Corrector Violin Training Teaching Black

This product is a violin bow straightener, made of high- quality steel wire material, and easy to use. It is used to the wrong playing posture, so as to develop a good bowing habit for beginners. It adopts double- section and double- design, which is more stable and convenient. It is more convenient to practice for beginners. The simple way to practise straight bowing! Self bowing practice guide, it can help you develop bowing and wrist movements. Fine workmanship. and portable.