Ironing board cover clips and traps have plastic washers that won't damage the fabric. Adjustable length allows for desired tension. Set of 4 stretchy bungee cords: the original length is 65-130cm, the maximum extension length is 200cm. If you want to extend its lifespan, try not to exceed 220cm when using it. Designed to keep 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 some relatively large items, such as sofa covers, sheets, cribs, mattresses, blankets, duvets, tablecloths, etc. Keep your bed sheet or sofa cover taut with these 4 tensioners! Plastic-coated metal clips keep them securely in place.