Features: brand new and high quality High-quality materials: The safety screw hook is made of solid metal material with a black coating, which is not easy to break and rust, and is suitable for indoor and outdoor use. Safety design: The hook on the top of the cabinet adds a safety buckle design to prevent items from falling. Easy to install: you can use a wrench to screw the hook into the wooden material, or drill the hook into the concrete wall. Wide range of uses: safety screw hooks are suitable for hanging lightweight objects, such as outdoor holiday lights, drip lines, potted plants, bird houses, curtains, ropes, chains, wind chimes, etc. The package contains: You can get 20/40 screw hooks for hanging and 20/40 plastic tubes. Specifications: Material: Iron Hook Size: Approx. 2.2x1.6inch Expansion Tube Length: Approx. 0.95inch Package Includes: 20/40Pcs Threaded Hooks + Expansion Tubes note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.