FOR GRIDWALL - Works with any standard 3" square grid panel VERSATILE - Use the bracket with wood, glass, melamine, and bullnose or plastic shelving SECURE LIP - These shelves brackets are 12 inches long and have a lip for further security METAL BRACKETS - This black hanger bracket is made out of sturdy and high-quality metal 8-PACK - 8 shelf brackets will be included in your package. As an example, for a 24" shelf, use 2 brackets