Fixings for the ironing cover and the traps have plastic washers that do not damage the fabric. Adjustable length allows for desired tension. Set of 4 extendable stretchers: original length is 65-130cm, maximum extension length is 200cm. If you want to prolong its life, try not to exceed 220cm when using. Designed to hold the bed sheet securely in place, ensuring a smooth, wrinkle-free surface for much better results. Easy, quick to change and perfectly secure. The extra long size makes it more suitable for certain relatively large objects, such as sofa covers, sheets, cribs, mattresses, blankets, duvets, tablecloths, etc. Bed sheet or sofa cover taut thanks to these 4 stretchers! Metal clips covered in plastic, they hold them well in place.