Product Details:Color: BlackMaterial: Carbon SteelUnfolded Total Size: 150mm x 25mm x 150mm/ 5.91" x 0.98" x 5.91" (L*W*H)Folded Total Size: 150mm x 25mm x 29mm/ 5.91" x 0.98" x 1.14" (L*W*H)Mounting Hole Diameter: 4mm/ 0.16"Package Content: 3pcs x Folding Shelf Bracket with ScrewsMaterial - Made of carbon steel material, these self brackets are corrosion-resistant, rust-free, with good support and stability.Feature - The L bracket with a straight 90 degree and spring load can not only install on the wall to easily hold a heavy board to keep you room storage or organized, but also it can be easily press to release the arm to fold and help you to save space, not influence your life.