[Plastic wall anchor set]: These anchors match a range of sheet steel and wooden screw sizes since they sort their own threads when installed. To install, fold the anchor in middle, insert right into a hole, and faucet flush. Thread a screw via your fixture and into the anchor. Extended size is the overall length of the anchor when folded in the middle. [High quality]: The plastic materials anchors are very sturdy and not clean to be broken, drywall self-drilling screws package is product of positive zinc-plated carbon steel, which aspects are oxidation resistance and corrosion resistance. [Application]: These drywall anchors and screws is perfect for hanging a wall shelf in pretty smooth drywall, or striking something light, akin to toilet and kitchen shelf. You can use the package to hold your blinds or shelf, not compatible for heavy ceiling chandelier. Specification Item: plastic drywall anchor Colour:gray Material:Plastic + Metal Package Contents: 30 * plastic drywall anchor 30 * Screws Only the above kit content, other merchandise are not included. Note: Light reflection and assorted reveals can cause the colour of the item in the photo a bit of varied from the genuine thing. The measurement allowed error is +/- 1-3cm.