The Vevor tree climbing spikes are built with a lightweight aluminum frame designed to support up to 350 lbs for demanding climbing tasks. Adjustable height from 14.75" to 21" helps provide a more personalized fit for different users. Soft EVA padding, nylon fastener straps, and durable TPU straps are designed for comfort, support, and secure attachment during climbs. Forged steel spikes deliver strong grip on tree bark for pruning, fruit picking, and other high-altitude work.