1、Easy to Use: These metal cord locks are easy to use. Press and hold the button while threading the pull cord through the hole in the lock, release the button once the drawstring is through, then your drawstring can be secured. 2、Zinc Alloy Material: These metal cord stoppers are made of strong and reliable zinc alloy material, which is highly durable and lightweight, not easy to break and deform. 3、Wide Application: These drawstring cord locks are suitable for shoelaces, backpack drawstrings, pet backpack, pants closures, lanyard, luggage, clothing, glove, flashlight, sportwear, tent, paracord products and more. 4、Flexible and convenient: This double hole cord lock attaches to drawstrings and tightens without the use of knots, making it ideal for outdoor activities, double hole design offers great flexibility and convenience. 5、30 Pieces: You will receive 30 pieces of lace locks in total. Please double check the size of these cord locks before purchase, to make sure whether the cord lock matches your application.