Use this extra long 18" Spike for safety covers in your lawn and landscape area. Lawn Spikes are an excellent option when a pipe-anchor assembly is not an available option. Poolzilla lawn Spikes are made with high-grade aluminum that is both durable and very strong. The bottom end of the Spike features a sharp point that will allow you to easily install into the ground. Lawn Spikes should never be placed at opposite ends of the same strap. Use this extra long 18" Spike for safety covers in your lawn and landscape area. Lawn Spikes are an excellent option when a pipe-anchor assembly is not an available option. Dimensions: The lawn Spike measures 18" long. The aluminum pin is 1/2" wide and can fit all types of springs. Poolzilla lawn Spikes are made with high grade aluminum that is both durable and very strong. The bottom end of the Spike features a sharp point that will allow you to easily install into the ground. Installation Note: Lawn Spikes should never be placed at opposite ends of the same strap.