【Adjustable Buckle】Adjustable cord stopper is easy to adjust the length of the cord to suit kids. It is more comfortable to apply. Easily slide over the pearl cord with a soft adjustable buckle that holds the face cover securely to the wearer. 【Multifunctional Silicone Buckles】This adjusting buckle is suitable for all kinds of mask ropes, as well as daily necessities. Multi-Functional cord stops for drawstrings, round elastic bands, sewing, elastic band, cord adjust. Widely used for lanyards, luggage, clothing, backpack, sportswear, shoelace, tent, and more. 【For Children and Adults】 These silicone round elastic adjustment accessories are mainly aimed at solving the problem of a too-long rope. For example, when a child wears a mask, the mask strap is too long. This product can adjust the length of the mask strap extender and eliminate the discomfort caused by this. 【Free Threading Device】Threading needles are provided. The threading device is sturdy and durable. Very suitable as a gift. Those who are helpful for sewing work or threading beads can thread beads. Suitable for threading and beads. The size helps to improve the efficiency of online. 📧 【24 hours customer service】: We are committed to 100% customer satisfaction service. After purchasing, if you have any questions, please contact us via email. We will help you solve the problem within 24 hours.