General description Strong triangular design for triple protection and a more permanent fixation. This set of 4 fitted sheet tighteners is designed to hold covers securely in place, ensuring a smooth, wrinkle-free surface for better results. They work with almost all types of bedding, including bed sheets, ironing board covers, seat covers, sofa covers, mattresses, blankets, quilts, and tablecloths. Technical specifications Original length: 9.5 cm to 16 cm Extendable length: 25 cm to 45 cm Usage These tighteners will keep your bed sheet or ironing cover firmly in place, providing the desired tension for a neat appearance. Other information Equipped with plastic-covered metal clips that securely hold the sheet or ironing cover in place.