Highlight [Good Quality] They use carbon steel and galvanized process, having fine workmanship, product surface without burrs, clean and flat appearance. [Easy Installation] 1. Hammer the anchor nail into the dry wall. 2. Insert the screw through the anchor hole. 3. Tighten the screw until it is secured. It's easier to install and remove. [Save Your Energy] If you need to remove screws and items, you can leave the anchor on the wall and reuse it to avoid leaving holes in the wall after use. [Expansion Design] When you tighten the screws, the split of the ribbed anchor expands in two opposite directions, thus increasing the holding force. [Suitable for] gypsum board, gypsum board, wallboard, gypsum board, SLATE, gypsum board, insulation board, light brick, etc. Detailed They use carbon steel and galvanized process, having fine workmanship, product surface without burrs, clean and smooth appearance. If you need to remove screws and items, you can leave the anchor on the wall for reuse to avoid leaving holes in the wall after use. When you tighten the screws, the split of the ribbed anchor expands in two opposite directions, increasing the grip. Key Feature: Save Your Energy: If you need to remove screws and items, you can leave the anchor on the wall and reuse it to avoid leaving holes in the wall after use. Expansion Design: When you tighten the screws, the split of the ribbed anchor expands in two opposite directions, thus increasing the holding force. Specification: Product Name: Self-Drilling Anchors Material: Carbon steel Size: Self-Drilling Anchors: 12 x 30 mm, nail: 4 x 30 mm Note: 1. There may be slight color differences between the product picture and the actual item. We will do our best to display the color as accurately as possible. 2. Please allow slight dimensional discrepancies due to manual measurement. Parts List: 100 x Self-Drilling Anchors 100 x Screws