Ergonomic spring mechanism - Securely holds cords with a spring-loaded grip and reinforced internal spring that delivers steady pressure, helping drawstrings stay firmly in place. The easy-to-handle teardrop design adds comfortable control. Strong hold design - Textured grip pattern keeps cords in position for reliable fastening. Enables effortless one-hand operation, quick adjustments, and cords that lock tightly for hassle-free use. Wide-ranging compatibility and uses - Fits cords up to 0.6 cm thick and works well in both lightweight and heavy-duty applications. Neatens loose cords efficiently on a variety of items. Convenient bulk pack - Pack of 50 black cord stoppers provides plenty for multiple projects. Ideal for DIYers and small businesses. Neatly organized to avert tangling and reduces the need for frequent restocking. Use scenarios - On clothing such as hoodies or jackets, quickly secure drawstrings with one hand for a tidy, snug fit. - On reusable fabric face masks, adjust and lock cords to maintain a secure, comfortable fit. - On bags, backpacks, or craft pouches, tidy loose cords and keep openings clean and functional.