Bed Sheet Holder Straps, Peyou [4 Pack] Adjustable Bed Sheet Clip Holder Bed Sheet Grippers Cover Fasteners with Metal Clips - Keep Your Sheet in Place! (WHITE) These Grippers are a simple yet clever invention that will ensure sheets remain tucked in and neat Easy to fix and remove.Simply clip a Gripper Strap to each corner of your sheet,to form an elastic strap that keeps your sheet in place all through the night Excellent to clip bed sheet,satin sheet, mattress covers, blankets etc.You can also use these Grippers to stretch a loose ironing board cover in place 4 of the Straps expands up to 220mm-390mm(8.66 Inch-15.35 Inch),please note, these have Metal Clips, and are not the cheap plastic ones Powerful bucke grip and good elastic feature make it best gripping tool for you