Adjustable and Black, low-messy: The length of the tensioner is able to be adjusted between 25cm and 65cm according to your needs, and because the band is elastic, it can be extended up to a length of 100cm. Shorter than others, but tighter during function, make the fabric more stable. Do not damage bed sheets: The alligator clips are designed with plastics, it allows tensioners to attach the tissues without any damage. Multi-purpose: Suitable for ironing boards, seat covers, sofa covers, sheets, crib underpads, mattresses, blankets, quilts, tablecloths, etc.Slightly short length gives more possibilities to these strips, you can apply them to so many places where you need to stretch, bind or fasten.