Parameter Information: Material: Nylon + Zinc Steel Color: Gray Tube Outside Diameter: 10mm Inner Diameter of Tube: 4mm Screw Diameter: 3.5mm Suggested Matching Drill Bit: 8mm / 10mm Product Description: Product Name: Expansion Tube Rubber Plug Screws Features: - The anchor is made of nylon plastic, which is highly insulated, resistant to wear and tear, and not easy to age. - The screws are made of zinc steel with galvanized surface to prevent rust and corrosion. - Applied to hollow core board walls with unique triangular design firmly fixed and strong load-bearing capacity. - Wide range of application, can be used in hollow bricks, gypsum board, cement fiber board, wood and other hollow substrates, also suitable for solid bricks and concrete. Using method 1. Drill the hole; 2. Clean the hole and embed the anchor bolt into the hole; 3. Tighten the anchor bolt; 4. Finish and start using. Place of Application: - Hollow bricks, gypsum board, cement fiber board, wood and other hollow substrates, also suitable for solid bricks and concrete. Product Weight : 50 G / 1.76 Ounces Product Dimensions (L*W*H) : 100*50*30 MM / 3.94*1.97*1.18 Inches Package Weight : 55.0 G / 1.94 Ounces Package Dimensions (L*W*H) : 104*55*35 MM / 4.09*2.17*1.38 Inches Retail Packaging: Yes, Plastic Packaging Package Include: 50 x Drywall Anchor Kits