Adjustable: With 5 levels of adjustment, these convenient sheet clips can accommodate mattresses of various thicknesses. Set of 4: A set of 4 that securely fastens the four corners of the bed, effectively preventing sheets from slipping. Easy to Use: Simple to attach, with a practical design that securely fastens sheets just by clipping them on. Durable: Made with high-quality materials, these clips are built to last for long-term use. Multi-purpose Use: Can be used not only for bed sheets but also for securing sofa covers and tablecloths. Prevents sheets from slipping, allowing for a comfortable sleep.