1、When you tighten the screw, the cracks in the ribbed anchor expand on the two opposite sides to increase the holding force. The anti‑rotation structure of the expansion sleeve is designed so that it will not follow the drill rotation when the screw is tightened. 2、Plastic anchors are made of high‑quality materials, which is durable and not easy to break. 3、Drywall anchors are all packed in a durable plastic box for your convenience and storage. 4、The screw assembly adds a layer of white zinc coating anti‑rust process, and the thickness of the coating is thickened to 2μm to enhance the anti‑rust ability. 5、Wide applicability, you can use this kit to fix blinds or shelves, very suitable for artworks, lightweight kitchen accessories, etc. 30 x Self-Tapping Screw (M4 x 25) 20 x Self-Tapping Screw (M4 x 30)10 x Self-Tapping Screw (M4 x 40) 20 x Self-Tapping Screw (M5 x 40) 10 x Self-Tapping Screw (M5 x 60) 10 x Self-Tapping Screw (M5 x 80) 10 x Yellow Expansion Rubber Plug (6 x 25Y) 10 x Yellow Expansion Rubber Plug (6 x 30Y) 10 x Yellow Expansion Rubber Plug (6 x 40Y) 10 x Yellow Expansion Rubber Plug (8 x 40Y) 10 x Light Green Expansion Rubber Plug (6 x 25B) 10 x Light Green Expansion Rubber Plug (8 x 38B) 10 x Gray Expansion Rubber Plug (6 x 25H)10 x Gray Expansion Rubber Plug (6 x 30H) 10 x White Expansion Rubber Plug (8 x 60W) 10 x White Expansion Rubber Plug (8 x 80W)  Item Type: Drywall AnchorsMaterial: Stainless Steel + RubberPurpose: Use This Kit to Fix Blinds or Shelves, Which is Very Suitable for Works of Art, Lightweight Kitchen Accessories, Etc. Zinc Self-drilling Anchors Are Heat-resistant, Used for Light Fixation in Drywall and Plaster