【Upgraded Triangle Buckle】: 3-way sheet holder straps with Upgraded NON-SLIP Triangle Buckle, which are the most stable to keep your sheets in place all night and keep your bed looking great all the times. Never worry about messy or wrinkled sheets again. 【 Round Shape Clip】: Bed sheet fasteners with Round Clips are easier to open than the other duck-bill clips in the market, so please don't worry about the clips hurting your hands when opening. 【Adjustable Length】: Fitted bed sheet clips with elastic straps which allows desired tension and fit all edge of sheet for heavy duty purpose. It is very convenient to adjust them to the length you need. 【Fit All Sheet Sizes】: Bed sheet holders will be able to fit all range of mattress sheet sizes including: Twin, Twin XL, Full, Full XL, Queen, King & even up to California King sheets. 【Wide Compatibility】: Our triangle sheet grippers fit with various sheets, it could be used on bed sheets, hospital bed, sofa cushion, mattress pads, tablecloth covers, chair / boat / car / motorcycle seat covers, ironing board covers and more.