1.Material:iron,steel 2.Have different colors 3.Extreme adjustment possibilites with oblong holes 4.Accept OEM Product descriptionMaterial:Iron,Steel Surface Treatment:Brass plated, white zinc Plated, Color Zinc,Nickel Plated,etc. Usage:Used in door,cabinet,cupboard,etc. Advantages:anti-corrosion; extreme adjustment possibilites with oblong holes