✓ Due to the different quality of dental floss, the dental floss may be ?deformed and elongated? during use. You need to tighten the floss again. In any case, it is more convenient. How to use: As shown in the figure on the left. ✓?Be careful!?This product does not contain dental floss, you can buy any brand of dental floss you like to use with this product. Suitable for any type of dental floss. ✓?Back teeth?It can better help you clean your back teeth than flossing by hand or other tools. ✓?Easy?Dental Floss Holder's unique design (angled head and long handle) makes flossing easier. ✓?Safety?PATENT PENDING. 1 Counts. High quality PP plastic. Dishwasher safe.