Check the listing for details. Tree Climbing Gear, Cowhide Leather Tree Climbing Spikes Set. Condition: New. Listed at 169.00 USD. Upgraded design : Rohseson Tree Climbing Spikes are made of 45# steel by Forging process. This Carbon steel is hard and stronge, not easy to deform, and more durable than stainless steel. The sharp Claws are easy to pierce into tree, which can support you stand or step on tree with more safety.