Ball shape plastic cord locks offer a practical, reliable solution for securing cords and laces across a range of items and activities. Broad compatibility: Ball shape plastic cord locks fit elastic cords, drawstrings, shoelaces, backpacks, clothing, hats, tents, and other items. They are suitable for outdoor and fitness products such as marathon running shoes, sportswear, and pants packs. Durable, material: Made of plastic, these cord locks hold and lock loose cords and laces securely. They are lightweight, smooth to operate, fade resistant, and designed for long term use in knitting and weaving industries. Quick and secure locking action: Easy to install and use. Squeeze the cord lock to release tension and allow movement along the cord. When released, tension engages and the cord lock remains in place, tightening without knots. One hole design with integrated spring: Ball shaped end with a single hole design and an integrated metal spring. Easy to move and adjust the cord clamp to prevent slipping. Practical use scenarios: Secure and quickly adjust shoe laces on marathon running shoes for a fast, knot fit during workouts. Tighten and fix drawstrings on backpacks, sportswear, or pants packs for a secure, comfortable fit. Manage tent cords or hood drawstrings in outdoor settings to maintain consistent tension.