Self-Drilling Drywall Anchors: Constructed from carbon steel with a yellow zinc coating, these anchors provide excellent resistance to rust and corrosion. When the screw is tightened, the ribbed anchor expands on both sides, ensuring a secure and stable hold in drywall. Self-Drilling Screws: Made from high-quality metal, these screws feature a clear, deep-thread design for superior grip and hardness. They resist bending or breaking and facilitate full anchor expansion to achieve maximum holding strength. Easy Installation: ① Tap the anchor into the drywall. ② Insert the self-drilling screw into the anchor. ③ Tighten the screw until fully secured. As the screw drives in, the ribbed anchor expands inside the wall, creating a strong and stable hold. Wide Applications: Suitable for drywall, gypsum board, lightweight brick, and hollow brick. Ideal for hanging picture frames, curtain rods, wall sconces, TVs, shelves, cabinets, artwork, bookshelves, chalkboards, and more. Package Includes: The set contains 100 wall anchors and 100 cross-head flat head self-tapping screws (M4 × 30 mm). The self-tapping screw design eliminates the need for pre-drilling, streamlining installation. Screws and mounted items can be easily removed when necessary.