High Dip Galvanized Ground Screw Pile made of carbon steel :Q235 ,according to standard ;DIN EN ISO1461-1999 ,not only used on the solar energy mounting projects,but also can be use for many other fields ,such as some temporary building,for timber,flage and banner,traffice sign ,for fencing construction ,for container house,for vineyard fencing ,for bridge & . it is easy to install ,no need digging ,no-concrete ,save time and cost .no harm to environment .