Ironing Board Cover Fasteners by Dritz's Clothing Care Line keep covers from slipping and fights cover wrinkling. 1. Position strap underneath ironing board on one side of the cover. 2. Place cover between the clasp's teeth and close. 3. Stretch strap to the other side of the cover. 4. Place cover between the clasp's teeth and close. 5. Repeat until all fasteners are placed. Keep out of reach of children!