Item Type: Expansion Screw Tube Kit Material: Iron + Plastic Weight: Approx. 203g / 7.2oz Expansion Screw Length: Approx. 80mm / 3.1in Expansion Tube Length: Approx. 80mm / 3.1in Applicable Type: Suitable for 8mm impact drill Package List 20 x Expansion Screw 20 x Expansion Tube 1. Please allow 0& 8209;1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1The curved design of the expansion tube greatly increases the anchoring force entrance. 2Using highquality iron + plastic materials, strong and durable, corrosionresistant. 3It can be used for concrete, natural dense stones, bricks, mortar bricks, lightweight concrete and hollow bricks. 4Fast installation, nonslip, safe and stable, good toughness, impact resistance and strong anchoring force. 5Very suitable for things fixed with lag screws and chipboard screws, such as cabinets, switches, etc.