Violin bow collimator straightener - Built with high-quality steel wire material for durability and user-friendly handling. - Provides a simple and effective way to practice straight bow technique. - Corrects wrong playing posture with a double piece and double track design, delivering stability and comfort during training. - Acts as a quiet teacher for bow holding, constantly reminding beginners to maintain correct bow posture and helping to improve technique and bow habits. - Suitable for violin sizes 4/4, 3/4 and 1/2; an indispensable tool for violinists and musicians looking to improve their playing skills. Use scenarios - Practice sessions focused on straight bowing and a consistent bow stroke. - Beginner lessons to establish good bow habits from the start. - Rehearsals or pre-performance warmups to maintain stable bow technique during longer playing periods.