Crafted by hand from iron alloy make these balusters much stronger than regular wrought iron. For interior and exterior use. Pre-finished with a durable baked on powder coat ensures years of maintenance free enjoyment. Simple attachment knuckle on top and bottom allows for do-it-your-selfer installation. Easy to use with any wood railing system. 5 decorative styles available in 4 fashion-able finishes: weathered copper, weathered brass, weathered nickel and glossy black. Each style comes in single and double patterns. 20 year structural warranty.