[High Quality] - This triangle bed corner support sheet holder is made of premium elastic straps, metal clips and an integrated plastic tightening system. [Adjustable Length] - Allows you to stretch your sheets as you wish, adjustable from 12cm to 56cm, for different family needs. [Triangular design] - The bed sheet clip has a triangular design specially designed, which prevents any slipping of the elastic. [Easy to Use] - The fitted sheet tensioner allows you to easily put on and keep the corners of the sheet in place, made of elastic, robust material and durable. [Box contents] - 8 pieces high quality adjustable chain tensioner, ideal for duvet cover, mattress cover, bedding, adjustable bed, Murphy bed, camping, tablecloth, covers -iron bed, etc.