Great Package: 20 Pieces upholstery furniture spring clips. Material: Made of iron and rubber, strong and durable, not easy to corrode. Advantage: It has 5 separate holes where screws, nails or staples can be used to fix the springs to the frame, with 5 Separate holes allows more catch points to ensure the spring does not tear free from the frame. Durability: It is durable at an affordable cost. Why replace your furniture when you can repair it at a fraction of the cost? We use these same spring clips in all of our commercial and custom furniture. 20 Pieces upholstery furniture spring clips can meet your replacement needs. Application: Can be used for either the seat or back springs, perfect for repairing your furniture.