Item Type: Violin Bow Collimator Material: Resin Package List 1 x Violin Bow Collimator 1DESIGNED SPECIFICALLY FOR BEGINNERS: Violin bow straighten collimator guide tool is suitable for beginners to use, easier to adjust and correct the curvature of the violin bow. 2RESIN MATERIAL: This violin bow collimator may be manufactured using excellent resin materials, which can provide stable and durable performance. 3CONVENIENT AND EASY TO USE: This violin bow straightener may be a simple and easy to use tool that can help users quickly and accurately adjust the curvature of the violin bow. 4ADJUSTABLE: This violin bow corrector may have adjustable functions, allowing users to adjust the shape and curvature of the bow according to their own needs. 5EASY CARRYING: Compact size and being light in weight make the violin bow adjuster easy to store and carry for convenient use.