This four piece carpet anti-curl holder uses vacuum technology to grip hard floors and keep carpets flat without damage. It is designed for use on hard surface floors and is not compatible with rugs on carpeted floors, rubber backed rugs, jute rugs, or fluffy backed rugs. How it works - The underside features small suction holes on the side that faces the floor. When pressure is applied from the top, air escapes from the low pressure area inside the suction cup, creating a sticky effect that keeps the carpet in place. - The grip can be easily positioned under the carpet and remains firmly attached to the floor without leaving marks or damage. Installation and use - The suction technology adheres securely to hard floors and releases easily when you want to remove or reposition it. - Suitable for washing because you do not have to separate it from the carpet. For carpets, the suction technology adds extra comfort due to its slightly fluffy character. Product details - Pack includes 4 pieces - Each piece is square, 3.9 inches by 3.9 inches - Thickness after installation is approximately 1/10 inch Applications and benefits - Enhances space perception in kitchens, bathrooms, and hallways by stabilizing mats and runners - Can be used outdoors to prevent shifting and to straighten corners Compatibility and notes - Not suitable for rugs on carpeted floors - Not compatible with rubber backed rugs, jute rugs, or fluffy backed rugs This description preserves the original product specifications and functionality while presenting clear, concise, and customer-friendly information.