Toweter Metal Buckle Adjustable Sheet Mattress Corner Straps For Your Sheets And Bed,215mm-335mm,4 Pieces A Set A set of 4 Adjustable Sheet Mattress Corner straps, one used diagonally for each corner of the bed. Metal Clasps For Secure Grip,keep all sheets smooth and tight on any bed. Great For Bed Sheets and Mattress Covers . Strong suspender clips . Keeps bottom sheets on all mattresses, even hospital beds, hide-a-beds, adjustable beds, inclining beds, baby's cribs .