THICKNESS - With perfect thickness 0.3mm / 0.012". MATERIAL - Made of good quality iron, the surface of white paint treatment, not easy to rust, waterproof. ABOUT PRODUCT - Suitable for 2-3 mm Back Board thickness of the picture frames. EASY TO USE - Without the use of screws directly to the card in the frame backplane. VERSATILE - Ideal for hanging picture frame, clocks or decorations on the wall., Manufacturer: 5 Elements