High Quality Material: This fasteners are made of ABS plastic, that will grip your bed sheets firmly. Easy to put on and keeps sheets in place and no more fixing sheets. | Durable And Multipurpose: Sheet holder usable on different sized beds, Sheet suspenders queen, king& twin; Bedding accessories. | Easy Install: These bed sheet holders have a Non-slip design, Simply insert the sheet holders under the mattress, press the button up to the upper hole and secure it. | High Efficiency: Set of 4 Pieces, 6.9 inches high, bed sheet grippers keep sheets in place and tight on bed,once they are on, they don't get off easily. | Money Back Guarantee: 100% Full Refund if you don't like your New Bed Sheet Gripper within 60 days.Any problems,just contact us,we will provide full refund or replacement within 24 hours!