[High Quality and Heavy Duty Hook for Hanging] The wall metal screw in hooks holds up to 40 pounds, suitable for interior and light hook outdoor uses. The string light hook is wind proof and rust proof which is suitable for lights & other all-year outdoor wire holder. With black rust proof coating, the outdoor light hanging hook will protect your hands, corrosion resistance, strong toughness and-Not-Electric leakage.[Safety Buckle Design & Easy Install] A open loop is installed on the ordinary screw which ensures quick release and provides total security and make sure the hanging items will not fall out, which increases the safety performance of the product. You can hit the wood directly with a hammer, or you can screw in the wood with a wrench. To install a hook on the wall, you need to make a hole in the wall, put a plastic tube, and then put the eye hooks into the plastic tube.The size of outdoor Christmas light hanging hook weight is 0.018lb and help your easy transport and storage. The material is very thick and hard, and the hook is not easy to break. suitable for interior and exterior use.[Wide application] Suitable for installing drywall in your home, office, building or workplace, etc. these metal screw in hook will be your good helper. It can be used in hanging outdoor string lights, hanging wire, drip line, plants, birdhouses, curtains, ropes, chains, mugs, feeders, planters and more. Perfect for securely hanging light weight items such as outdoor Lights, drip line, plants, birdhouses, curtains, ropes, chains, mugs, feeders, planters and more.Easy Installation: 1. Installs directly into wooden surface, sharp screw point bites into wood easily and quickly, just twist into place. 2. If you want to use these black cup hooks from drywall, pre-drilling may be required, 1/8in drill bit is recommended.Colour: black + silverMaterial: ironSize: about 55.5mm in lengthPackage Contents:40 x hooks40 x plastic expansion10 x S-shaped hooks Only the above package content, other products are not included.Note: Light shooting 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.