Package Contents: 4 x Blind Clamp Brackets, enough for installing or replacing your blinds. These replacement brackets allow easy, no-drill attachment to the window casement, compatible with Klemmfix blinds or double roller blinds. They provide extra stability for your blinds. Suitable for PVC or wooden windows, with or without a seal, that can be opened. The self-adhesive strips ensure the stability of the hook and prevent it from sliding on the window surface. Material: Our product is made of high-quality plastic, and the glue on the back is very strong! (It is recommended to clean the adhesive surface of the car window in advance with a cloth.) The replacement parts are compatible with roller shutter brackets and a 1.2 cm fabric support rail and mounting rails with a height of 3.6 cm. Installation recommendations: After installing these roller shutter bracket replacement parts, please do not use for 24 hours to ensure stronger adhesion.