The anti-parking post require only bolting down to the ground before use, making them very simple to install and secure. Specification:Name: security posts for drivewaysParking Pole Material: Cold rolled steelWaterproof level: IP67Height: 50cm, 60cm, 75cm, 100cm. Diameter: 7.6cm, 8.9cm, 11.4cmFeatures:1. DURABLE DESIGN: With an IP65 rating & solid steel body Robust and Waterproof2. High-quality paint to prevent erosion: Three-layer computer baking technology, anti-rust technology on the surface.3. FOR CONSTRUCTION & CARS Secure rental cars valet parking block streets, or anchor signs in construction zones & shops4 Steel Pipe s protect buildings, pedestrians and equipment from vehicle or forklift collisionsInstallation Step1. Mark the punch position2. Drilling with an electric drill3. Tighten the screws4. Installation is completePlease be aware:1. 2. If you have any questions or concerns, please contact us and your email will be replied within 24 hours.