The most essential part of a Bow is learning how to tighten and un-tighten the hair. In order to tighten the hair on the bow you must turn the button clockwise or to the right. It is important to not over tighten the bow; you want at least a pinky length between the hair and the wood. Over tightening the bow can result in hair breakage and in extreme cases the wood may snap. Un-tighten the bow when not in use by turning the button counter-clockwise or to the left. Ask your music teacher or local string shop if you are unsure or feel uncomfortable with this process. Again, desist from touching the hair with your fingers or hands. Our oils can tarnish or stain the hair making it harder for the hair to grip the strings.