The package contains only 4 brackets, size: 10X4X18cmGreat Mood Every Morning: With 4 locking clips to hold your sheets and adjust the snaps on the straps, these bed slings will keep your sheets tight all night long, ending the daily annoyance of your sheets not staying up in place. No. No more flying sheets in the morning! Save time on making sheets and start your day in a good mood. Sheet Straps: Easy to remove or reattach, our sheet support straps securely hold your sheet so it's perfectly taut and flat. This soft feel will help keep you comfortable when you lay down to sleep and will keep you comfortable throughout the night for a better night's sleep. Durable Fitted Sheet Clip: The locking clip is designed for easy use. Much stronger than ordinary clips, this type of innovative clips are good for your sheets, providing maximum hold and preventing fabric damage. ADJUSTABLE AND MULTIFUNCTIONAL: It adapts to different sizes of mattresses. One Size, Full Size, Queen Size, King Size. It can be used to help hold flat sheets or fitted sheets and other comforters such as mattress toppers. Can be used to hold sheets, mattress toppers, tablecloths, couch covers and more.