1. Spring Cord Lock End Toggle The size of this silver tone cord lock is 17.6x19.6mm/0.69'x0.77'(Dia.H), the hole diameter is 5.3mm/0.21', and the package content is 20pcs double hole cord locks. 2. Wellquality Material Our alloy cord lock is made of durable alloy and spring that's sturdy enough to handle daily use even in the long run. With electroplating treatment, it has good antioxidation properties that will not fade or rust easily. It is lightweight and easy to carry that can meet your daily needs. 3. Spring Loaded Design The alloy doublehole cord lock is for locking the cord for convenient use and will not cut the line. They are springloaded and keep your cord tight, which will help to stop the cord or drawstrings from slipping. 4. Press the button down and hold it while threading the drawstrings through the holes in the lock, once the drawstrings are through, release the button. The cord lock will keep your drawstrings in place.