No more slipping sheets! Featuring an upgraded O-ring and a fully sealed design with secure straps, ensuring lasting installation and performance. No need to worry about the straps popping off. Features a stable triangular design with six-sided/12-point sheet fasteners that cross left and right. These adjustable corner sheet holders can be clipped at 12 points, firmly securing your sheets in place. Safe and durable. The buckle and built-in plastic clamping system protect the fabric from damage and won't harm your sheets, ensuring they stay firmly fixed to the mattress! Made from safe materials. The sheet fastener straps are crafted from high-quality elastic band, metal clips, and soft plastic, making them durable, fade-resistant, and rust-proof. Multifunctional. With a few simple steps, you can securely fix sheets, mattresses, tablecloths, ironing board covers, sofa covers, and more, in any size.