1. Smooth surface without burrs, nickel-plated and durable. Thanks to the pointed screw thread tip, the cup hook is easy to install and remains firmly in place.2. Simple and practical safety buckle design.3. Solid color looks rustic and goes well with your hanging items.4. Easy to install on the wall or wood surface, suitable compatible with indoor-outdoor.5. Widely used on coffee cup, party flag, garden lamp string, outdoor lighting and home decor, etc.Hook Opening diameter: 0.6 inchesLoad capacity: 40lbsSuitable compatible with: outdoor lights, drip lines, flowers, birdhouses, curtains, ropes, chains, wind chimes, etc.colour:BlackMaterial:metalPackage Contents:15 x Lamp Holder Hooks15 x Expansion TubesOnly 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.