Material: The shell is made of polypropylene, a neatly braided nylon rope with a sturdy zinc alloy cog wheel that can be adjusted flexibly and an aluminum buckle to be fully locked and can safely support up to 68 kg. Easy to use: 1. Fix the hook in a fixed place with a pulley. 2. Use another hook at the other end of the rope to hang your product. Pull the rope without a hook to adjust the product upwards. If you need to adjust the product downward, push the position lever built into the pulley, then pull the rope with the hook. Adjustable: Fully adjustable and locked, extremely high tear and rust resistance, can be used for a long time. The carabiner buckle is a practical, quick, self-locking and anti-loosening design to ensure safety. Compatible: Compatible with reliable support and correct clearances of the system and clamping mechanisms, provided the hooks and eyebolts fit. With a metal clasp to attach the rope to one end, these hangers make raising and lowering lights and other items easy and smooth. Ideal for hanging tents, fans, and more. Wide range of applications: Suitable for hanging LED grow lights, aquarium lights, fans, ventilation systems, filters, reflectors, flower pots, miner's lamps, and more. Specification: Material: Polypropylene, Zinc Alloy Gear, Aluminum Buckle