1. Sheet clip: Being elastic, it is made of high quality nylon tape and metal clip, which is suitable for most sheets and mattresses. It is possible to fix your sheet for the sheet clip without additional adjustment by staying in one place and never messing up sheets. 2. Durable Sheet Clip: Wider nylon webbing provides a stable and firm grip for important applications. The metal clip can hold your sheet well. The highly elastic bed frame has a stable and secure grip on the sheets (suitable for oversized mattresses) 3. Simple installation: It is recommended to install more than 2 people. The installation procedure is simple, it can be installed in a few simple steps. It holds the sheet firmly and prevents it from slipping around the corners. 4. Extra long size: It is adjustable from 20 inches to 82 inches (50 cm to 210 cm). Our product is provided by Amazon logistics with service and quality guarantee (4pcs). 5. Money Back Guarantee: If you don't like the new sheet clip within 30 days, please contact us for a full refund. Or if there is a product quality problem or if the product does not meet your highest expectations, we will replace it for you. In order to ensure your complete safety and quality service, we strive to provide services to our customers. Please avoid buying from other sellers.