Adjustable Bed Sheet Cover Grippers Suspenders Holder Band Straps Clips Fasteners, Mattress Cover Fasteners Set of 12 Material:Plastic + elastic. Made of sturdy chrome metal clips and heavy duty elastic bungee cords that will grip your bed sheets firmly and will not break easily. The length of the adjustable range between 15 to 22 cm. Holds tightly in place, bed sheets, mattress pads, tablecloths, ironing board covers, slipcovers and more; Always keeps corners in place and no more worries. With the strong build of these straps, your bed sheet will stay in place for a long time and keep your bed looking great at all times