A perfect hairpin that will give a botox effect to your eyebrows and eyes whenever you want. How to use * With your buckle open, adjust the adjustment part of the elastic according to your own head size. This measurement may vary from person to person. You can adjust the tightness of the elastic in the adjustment section according to your comfort and the effect you want to see. However, you should make sure that the buckle is open when you want to adjust it. *After making the adjustment and putting the buckle on your hair, you closed the buckle. * You can use the buckle either under the hair or over the hair as you wish. It will never be visible as it will remain under your hair. The package content includes one black eyebrow tightening buckle, two small bobby pins and an introduction card. *You won't believe the effect it has on your eyebrows and eyes.