1Pcs Yootones Violin Bow Straighten Corrector Tool Guide Violin Bow 1/2-4/4 Violins Collimator Adjuster Corrector Compatible with 1/2-4/4 Violins Practice Training Exercise

Violin bow straighten corrector tool is compatible with 1/2 - 4/4 violins. Violin bow straighten corrector tool is transparent part is made of tough plastic, durable in use. Violin bow straighten corrector tool the hook and loop closure design is easy to mount on or take it down, easy to use. Size: 63 x 57 x 15mm/2.48 x 2.24 x 0.59inch. Color: Transparent/Black. Encourages straight bowing and correct wrist action. Playing great role in mastering correct bowing action and improving their playing skills.