Ironing cover attachments and traps have plastic washers that do not damage the fabric. Adjustable length allows desired tension. Set of 4 extendable tensioners: original length is 16 to 25 cm, extendable up to 33 to 53 cm. Easy, quick to change and perfectly secure. Designed to hold the ironing board cover securely in place, ensuring a smooth, wrinkle-free surface for much better results. Suitable for ironing boards, seat covers, sofa covers, sheets, cribs, mattresses, blankets, quilts, tablecloths, etc. Sheet or cover ironing tight thanks to these 4 tensioners! Equipped with metal clips covered in plastic, they hold the sheet or ironing cover securely in place. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.