Boncas Adjustable Sheet Holders | Sheet Fasteners | Sheet Grippers | Sheet Suspenders for Various Bed Sheets, Hospital Beds, Inflatable Beds, Adjustable Beds (Set of 4, Black) Professional adjustable design to fit for any kind of beds and sheets. Ideal solution for comfy tight sheets. High-quality chrome clips with inside plastic teeth that would hold the bed sheet tight but will not ruin the sheet. Easy to operate. Set of 4.