YYST 4-Piece Triangle Model Metal Clip Holder Bed Sheet Grip Cover with Two Tie Stays 1. Keep your bed sheets tight - Set of 4 per package so there is one for each bed corner. Keep those fitted sheets from sliding off at the corners. 2.Adjustable - Adjustable length allows desired tension. Keeps corners in place and no more worries. Made of durable elastic and nickel plated clamps. the clamps have a fabric protector so that no damage is caused to your bed sheet. 3.Triangle designs - The bed sheet clip has a especially designed triangle model, which avoiding the elastic sliding all the time. 4. Make your life easier..- this versatile triangle bed sheet gripper works with all types of bedding. They secure fitted sheets, flat sheets, mattress pads, and even ironing board covers. 5.BUY CONFIDENTLY - if you aren't 100% satisfied, we will provide you with a refund or a free replacement - whichever you prefer