PREMIUM QUALITY: Crafted with elastic bungee cords and metal clips, these bed sheet fasteners provide stronger and sturdier grip for heavy duty purpose, no worries over the clips falling apart on use ADJUSTABLE LENGTH: The greatly adjustable fasteners allows desired tension ,designed for fitted sheets, sofa cushion covers, table cloth etc FUNCTIONAL DESIGN: Premium elastic bands provides stable and stronger grip for heavy duty purpose. The sheet holder is adjustable, which allows you to find the desired tension and keep your sheets tidy all the day, enhance your sleeping experience, no more loose sheets in the middle of the night Built-in plastic clenching system does not harm fabric EASY TO APPLY: This versatile sheet fastener is ideal for all types of bed sheets, mattresses, tablecloths, ironing board covers and sofa covers.It will always stay in the right place to make your life easier (zhongchengdaye)