Adjustable Bed Sheet Clips: keeps those fitted sheets from sliding off at the corners and keeps corners of comforter or duvets in Place. Stable Triangle Design:3 Pull Side of Each Corner, pulls the bed sheet and linen over the corners of the mattress tightly.Duckbill clip containing soft plastics, does not will bite bad sheets and other items. Adjustable Sheet Fasteners: Adjustable sheet straps with durable elasticity, can be longer or shorter. Ideal for sheets, mattresses, tablecloths, ironing covers, covers and more. Durable Material:The elastic wide bands provides stable and metal stronger clamps for heavy duty purpose, easy to apply and remove Widely Used:Suitable for bed sheets, mattress protectors, tablecloth clips, duvet covers, mattress covers, bed linen etc."