●Clamp holder features plastic material. It is durable and will not peeling off easily, providing long lasting support. ●Suitable for both roller blinds and double roller blinds, our clamp holder is designed to fit various window casements.The adjustable brackets can be adjusted to fit window casement with a width of 1.6 to 2.5 cm. ●No drilling or tools required! Our clamp holder is adjustable and can be easily installed on PVC or wood windows and door wing. ●With our clamp holder, you can transform any room into a stylish and functional space. Whether it is your living room, bedroom, or office, this versatile accessory will add a touch of elegance to your window. ●The clamp holders have a adhesive on the back, which ensures strong adhesion and allows permanent attachment. As a result, they do not come off easily and provide reliable support for your blinds.