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! Suitable for outdoor string lights, patio lights, Christmas lights, plants, fairy lights, bird feeders and houses, flower pots, wind chimes, icicle lights, deck lights, mugs, and decorations