The Castle Wall Spike is an extremely sharp, strong, thick reinforced Wall Spike. The Castle Wall Spike appears very neat and attractive and is the perfect solution for thick boundary walls. It consists of a double row spikes the front row being the Castle Spike (120mm) and then a smaller row of spikes behind it. The Castle Wall Spike is very durable and cannot be bent down by hand or object like most other wall spikes can. We prefer not to install any other wall spikes than the Castle Wall Spike. Protecting yourself and your family should not be about selecting a cheaper or inferior option. Always choose the best quality product available for protection. All Castle Wall Spikes are fully galvanized in either silver or gold & therefore are maintenance free.