High-quality steel screw hook. High-quality metal with a safety ring design, durable screw hook, not easy to break or rust. Easy installation? You only need a hammer, wrench, or drill to hang the screw into a wooden or concrete wall. You only need to install the expansion tube first; it can be easily installed with the screw hook. Beautiful design? Screw bolt length 5.2 cm, stainless steel hook width 2 cm, safety ring design prevents hanging objects from falling, improving the safety performance of the black hook, tested up to 40 kg. Wide range of applications? Ceiling hooks, ideal for indoor and outdoor use. They can be used to hang large objects such as pots, lanterns, bird cages, or to place small objects such as cups. What's included? You will receive 30 hook screws and 30 expansion tubes, enough to meet your daily hanging needs.