The second-generation violin bow straightener adopts a double-segment double-track design. The grooved plastic clip is more stable and convenient to install. It has dual jacks. Users can insert the steel bars into the corresponding jacks according to their own needs, and the bow cannot be pulled. Directly affect the pronunciation and timbre, etc. This straight bow corrector is easy to use and has a significant effect, allowing practitioners to focus more on rhythm/pitch Product: 4/4 Violin Double Track Adjustable Width Bow Straightening Corrector Size: 15.3x12.5x1.3cm Colour:black Material:ABS+steel Package Contents: 1 x bow straightener Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.