Features: Wide usages: The no drilling rod mount holders not only can be applied to smooth surfaces, but also suitable for textured walls or rough surfaces, such as glass, mirror, tiles, marble, stainless steel and more. Fixed tightly without falling: The shower curtain rod retainers are sturdy and equipped with screw buckles to avoid potential and unnecessary falling off, which can ensure the safety of your family in the shower. Specifications: Material: acrylic Color: black Size: about 3.15 x 3.15 inches Package includes: 4 x Shower curtain rod mount holders Warm notes: Due to the differences in lighting and screen settings, the color of the items may be slightly different from the picture. Due to different manual measurement methods, please allow slight size differences.