High-Strength Steel Frame: Built with 42CRMO steel, the tree climbing spurs support up to 350 lbs. ASTM-F887 tested for deformation, ensuring every climb is secure. Disclaimer: Not certified as fall protection equipment. For positioning/utility use only; not intended as primary security rope. Complete Tree Climbing Kit: The tree climbing spike set includes 1 security harness, 1 pair of climbing spikes, 1 pair of hook-and-loop straps, 1 utility rope and 2 spike protectors. Provides full protection with stability, security, and durability Comfortable Fit: Our tree climbing gear features soft EVA padding absorbs shock and supports your legs. Molded thigh plates conform to your body for long-lasting comfort during extended climbs. Sharp & Durable Spikes: Forged and heat-treated steel tree climbing spikes penetrate tree bark easily, offering excellent grip and stable climbing Adjustable Height: The with adjustable frame height from 15.4 to 18.5 inches, allowing a customized fit for users of different heights