The triangle bed sheet fastener strap is a genius sheet /cover fastening system which makes your life Easier and more Enjoyable. A 3 way stable triangle design/wider elastic bands provides stable and stronger grip for heavy duty purpose. Built-in plastic clenching system protects fabric from harm and no damage caused to your bed sheet. The sheet straps clip fits with fitted sheet and flat sheet for size Twin, Twin XL, Full, Full XL, Queen, King even up to California King sheets., Adjustable length allows desired tension. Our sheet fasteners fits with fitted sheet and flat sheet ,sofa cover, cars seat cover,tablecloths,couch seat cover,chairs seat cover and more, and make your life easier. Easy to use,Fasten 3 clips at corner of your sheets, Repeat above for all 4 corners and flip the fitted corner back down over the mattress, Adjusting the tension on the straps.They will grip your bed sheets firmly and keep your bed looks neat at all times.