Starter Bundle - 2 Items: 100 Aluminum KAMsnaps Cover Buttons with Flat Backs and Assembly Tool Kit - Lead Free SIZE 20 (1/2 INCH) FLAT Bundle - 2 items: 100 covers with 100 flat backs + assembly tool Using the 2-piece do-it-yourself assembly tool, you can cover these buttons with any fabric of your choice in just seconds. Works with upholstery, jewelry, hair pins, and many other crafts. Cover buttons have been tested for lead and meet CPSIA regulations regarding children's products.