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, perfect for hanging outdoor patio string lights. No worry about items being knocked off, more secure. Sturdy & Strong: The outdoor light hooks are 2.2 x 1 inch, made of quality metal with black rustproof coating, suitable for indoor and outdoor use. Q hanger screw hooks are heavy duty and durable, can hold a good amount of weight up to 40lb, can last many years. Easy to Install & 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 0.24in 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, and permanent. You can use them literally anywhere! Perfect 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. Risk-Free Purchase: Package Includes: 20 PCS screw in hooks and 20 PCS plastic tubes. If there is any problem with our products, please contact us without hesitation, and we will solve the problem as soon as possible.