Foloda bed sheet fasteners are made of sturdy chrome metal clips and heavy-duty elastic bungee cords that will grip your bed sheets firmly. Easy to put on and keeps sheets in place and no more fixing sheets, adjustable length allows desired tension. Triangle designs, which avoiding elastic sliding all the time. Also, this Fastener can be used as tablecloths, grill covers, cars seat cover, boat seat cover, motorcycle seat cover, scooters chair cover, and more. Step 4 Adjust the buckle to shorten or lengthen as you want.