Dimex 8 in. spiral anchoring spikes are made from heavy duty composite nylon plastic and should be used to anchor landscape or paver edging installations. Dimex spikes are great for many other general landscape applications as well. Suggested use rate for a standard landscape edging installation is one spike per every 2 ft. to 3 ft. of edging. Suggested use rate for a standard paver edging installation is one spike every 1.5 ft. of edging. Sold in quantities of 6, 24, or 144 spikes.