Our durable, multi-purpose single barrel lock is the perfect tool to secure, organize, and manipulate your paracord, rope, and twine supplies. Useful in various indoor and outdoor applications including drawstrings, paracord fastener, shoe laces, bags, luggage, clothing, and projects around the house. The body of the lock is made with an industrial-strength, specially engineered plastic designed to withstand extreme cold and hot temperatures, moisture penetration, and all weather conditions. HEAVY DUTY SPRING keeps even the thinnest cords held tight. When fully extended, the cord will completely close the hole so it will work with virtually all sizes of cords that you can manage to squeeze through there. No slip through these toggles when reasonable tension is applied.