Length:Adjustable from 11.8 to 47 (30cm to 120cm),providing great flexibility,meets the varied needs of families. Protection:The closure is constructed of system plastic,does not harm the fabric,Metal clasps for a Secure grip. Strong and durable: The fasteners are made of sturdy metal clips and heavy elastic tensioners, which will hold your bed sheets firmly and won't break easily, the fasteners will last a long time. Multi-function :Adjustable professional design to fit all types of sheets, Hospital Beds, Air Beds, Adjustable Beds, Water Beds, Futons, RVs, and Hide-a Beds. Easily attach: the sheet of bed ties are very easy to use thanks to its humane design. You can easily put it on your bad sheets in seconds without any tools, controlling the corners in place.