[Snap-on Buckle Design] String light hooks are designed with spring self-locking snap buckle that remains closed and locked until it is intentional opened for disconnection. Snap hook can effectively prevent your hanging object form falling down.[Easy Installation] Christmas rope lights hanging hooks set is easy to install. You can use a screwdriver to screw the nail into the wooden , tree, fence, eaves etc. And for concrete or brick walls you can pre drill a hole then put a plastic tube into the hole, then tighten the screw into the plastic tube.[Versatile Applicable] Swivel hooks work for home christmas lights hooks, pumpkins halloween, Xmas led string light, holiday fairy lights, patio string bulb. Wall hanger hooks is also perfect for hanging potted plants, theme party wall decor, etc.[Material] Ourdoor wire holder is made of materials. Screw nail is made of materials. Each hanger hook can withstand Max 8 LB. It's suitable for indoor or outdoor use.[Practical Hanger Set] Patio light hooks set come with 40pcs wall hanger hooks. Eye hooks are enough for your daily use or festival needs. And it's also a great gift or friends.We recommend starting a hole with a drill bit first in concrete wall, it will made it easier install.Colour:BlackMaterial:MetalPackage Contents:40 * String Light Hooks40 * Expansion tube1 * Storage BoxOnly the above package content, other products are not included.Note: Light reflection 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.