Universal no drill curtain rod brackets are suitable for smooth surfaces (e.g. tile, metal, glass, wood, marble, stainless steel), for rough surfaces, please use screws to fix them (e.g. drywall, concrete wall, stucco wall, wallpaper) Universal brackets adapt to all wall types while protecting surfaces. [Nail Free Curtain Rod Hooks]Crafted with premium ABS material. Black finish blends with modern bathrooms/bedrooms/kitchens decor. [ Adhesive Universal No Drill Curtain Rod Bracket]Peel & stick adhesive works instantly, reaches full strength in 24hrs. [Multi-Space Application]Functions as towel racks/kitchen hooks/bedroom hangers. Organize curtains/shower curtains/towels without damaging rental apartments/dorm rooms. No tools are required, just peel off adhesive to install. Color: Black Material: ABS Package Contents: 2 x Adhesive No Drill Rod Brackets Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.