Hardscaper's Choice spiral nylon anchoring spikes are made from heavy duty composite nylon plastic and should be used to anchor paver or landscape edging installations. Hardscaper's Choice anchoring spikes can also be used for many other general landscape applications. Each pack contains (9) 8 in. spiral nylon spikes. Suggested use rate for a standard paver edging installation is one spike every 12 - 18 inches, or as desired. Suggested use rate for a standard landscape edging installation is one spike per every 24 - 36 inches, or as desired.