Heavy Duty Shade Sail Poles -- Our shade sail pole is made of high-quality carbon steel, processed from solid material. 3 inches diameter, with a wall thickness of 2mm, and is composed of 3 sections joined together, with a total length of 10 feet. Paired with four M16 expansion screws, they provide sufficient grip to securely anchor your sun sail pole to the ground, offering you shade on hot summer days. Suit Both Cement and Grass Ground -- Our shade sail poles are designed for easy installation on concrete surfaces using the included concrete anchor. However, if you plan to install this sun shade sail pole kit on grass, you'll need to purchase our footing cage separately and secure it with cement. Easy to Connect -- Our sun shade sail poles are comprised of three sections.