1. Easy to Use: These metallic cord locks are easy to use. Press and hold the button while threading the cord through the hole in the lock, release the button once the drawstring is through, and your drawstring can be secured. 2. Zinc Alloy Material: These metallic cord locks are made of strong and reliable zinc alloy material, which is very durable and lightweight, not easy to break and deform. 3. Wide Range of Applications: These drawstring locks are suitable for shoelaces, backpack drawstrings, pet backpacks, pant closures, cords, luggage, clothing, gloves, flashlights, sportswear, tents, paracord products, and more. 4. Flexible and Convenient: This double-hole cord lock attaches to drawstrings and tightens without using knots, making it ideal for outdoor activities; the double-hole design provides great flexibility and convenience. 5. 30 Pieces: You will receive a total of 30 pieces of cord locks. Please check the size of these cord locks before purchasing to ensure the cord lock fits your application.