ELASTIC BED SHEET STRAPS - Made of high quality 1 wide elastic band and clips to fit all types of bed sheets, bottom sheet, fitted sheets, flat sheets, mattress pads etc. The strong elastic strap provides a secure and strong grip. No more loose sheets in the morning!EASY TO INSTALL, EASY TO USE - Easy to put on, keeping corners in place with minimal effort. Simply secure the 4 pieces of the bed sheet fastener to the 4 corners of your mattress sheet. Slide it underneath the mattress and adjust the buckle for greater tension. Avoid the hassle of lifting heavy mattresses up or flipping it around!FITS ALL KINDS OF SHEET SIZES - The bed sheet holder 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. (See Our Mattress Size Chart for reference). Designed for the best, this handy bed sheet suspender work well with all types of bedding mattresses, adjustable beds and more!HIGHLY RECOMMENDED CORNERS GRIPPER - Well made and sturdy chrome metal clips and heavy duty elastic cords, these sheet keepers will hold your bed sheets tight every night. Works like a charm! The built-in clenching system is made of plastic to protect your fabric from damage or tearing.QUALITY ADJUSTABLE METAL BUCKLE - Lengthen or shorten the sheet stays depending on your use, from 8.3 to a maximum of 13. Use it to secure other sheets such as your ironing board covers, mattress covers, cushion covers, seats and more!