About this item High Quality: The screw hook is made of high quality stainless steel and has a safety buckle design. The black hook screw is durable, dustproof, not easy to break, and has a long lifetime. Easy to Install: All you need to do is screw the screw hook into the wooden or concrete wall with a hammer, wrench or drill. Just install the expansion pipe first and the screw hooks can be installed easily. Exquisite Design: The length of the black screw hook is 5.2cm, the width is 2cm, and the end diameter of the black screw hook is 5mm. Safety buckle design to prevent hanging objects from falling, which improves the safety performance of the exterior screw hook. Wide Range of Applications: The screw hooks are very suitable for hanging outdoor lights, wind chimes, plants, birdhouses, curtains, Christmas string lights, Christmas decorations lanterns/lights, decorative pendants, etc. Package Includes: You will get 30 black screw hooks and 30 expansion tubes, the number of screw hooks is enough to meet the hanging needs of your daily life. The screw hook is suitable for indoor and outdoor use.