These heavy duty rubber bands are perfect for a variety of tasks, including bundling items, securing documents, and holding things in place. They are made of high-quality rubber, and are thicker and wider than standard rubber bands, making them more durable and long-lasting. The black color makes them invisible, making them ideal for use in office or home settings. With 20 pieces in a pack, they are a great value for money and will last for a long time. These rubber bands are also great for outdoor activities, such as camping survival, hunting, and hiking, as they can be used to secure items to your backpack or gear.