High-Strength Steel Frame: Made from durable 42CMOR steel, the tree climbing spikes supports up to 350 lbs. ASTM-F887 tested for deformation, ensuring stable, confident climbs. Disclaimer: Not certified as fall protection equipment. For positioning/utility use only; not intended as primary security rope Enhanced Security Protection: The tree climbing spurs features adjustable hook-and-loop straps that secure the spikes to your legs, providing stable support and reducing discomfort during extended use Comfortable Fit: Our tree climbing gear comes with soft EVA padding cushions your legs and absorbs shock, while molded plastic thigh plates conform to your body for long-lasting comfort Sharp & Durable Spikes: Forged and heat-treated steel tree climbing spikes penetrate tree bark easily, offering excellent grip and stable climbing Adjustable Height: The tree climbing spike set with adjustable frame height from 15.53 to 17.3 inches, allowing a customized fit for users of different heights