Safety Buckle Design: Add safety buckle design to prevent hanging objects from falling, even in high wind. Compared with ordinary ceiling hooks, the q hanger hooks are weatherproof and wind resistant, suitable for hanging outdoor patio string lights. No worry about items being knocked off, more secure Sturdy and Strong: The outdoor light hooks are 2.2 Inches, made of metal with black rustproof coating, suitable for indoor and outdoor use. Q hanger screw hooks are heavy duty, can hold a good amount of weight up to 40lb, can last many years Easy to Install and Use: String light hooks are easy to install. You can screw the hooks into the wood by hand or with a wrench, or use an electric drill to drill a 0.24 inch hole in the concrete wall, plug the expansion tube into it, finally use a wrench to screw the hook in. Great for patio, roof, deck, ceiling, porch, balcony, tree, fence, and more Widely Used: Outdoor hanging hooks are windproof, strong. You can use them literally anywhere!