HIGH QUALITY MATERIAL: Made of finely woven nylon with sturdy metal gears that are flexibly adjustable and fully lockable to safely to 70kg. Loose Protection: The cord automatically locks into position where you pull it and remains locked press the thumb release lever to release it. No need to worry about stretching, folding or loosening. Adjustable: High-strength metal gears are installed inside the pulley to quickly adjust and lock the rope. You simply pull the free end of the rope to adjust the hanging item to the desired height. Compatible: As long as the hook and eyebolt fit, it is compatible with reliable support and correct system spacing and clamping mechanisms. Wide range of applications: used for hanging LED grow lights, aquarium lights, fans, ventilation systems, filters, reflectors, flower pots, pit lights, etc. The actual product may have slight color differences or differences, which does not affect use. Color: Black Product Weight: 330.0g Material: plastic + metal Package Contents: 4 x Heavy Duty Rope Hangers 4 x fixed buckle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.