All these components need simple tools suchasscrew drivers, wrenches etc. More over these components are factory pre-install which help saving labor cost and time.This product has passed through rigorous testing and we provide 20 years of quality warranty. Thesemounting systems can stand up to the extreme weathercomplied with the AS/NZS 1170 and other international structure load standards  such as SGS,MCS etc .The designs and calculation according to thestructural mechanics and constructions acts makes productstrong, stable and safe.VG Solar was established in Shanghai in January 2013, which specializes in the development of Solar PV mounting system, design, manufacturing, sale and installation. As one of the top professional solar mounting brackets supplier, since its establishment, the products have been exported to many countries and regions. We have our own innovation R & D team, toward the forefront of technology and continuously explore and practice. Products in the research and design process in strict accordance with different country‘s standard, not only through the UL, TUV, Golden Sun certification, but also actively introducing a number of international management systems such as ISO9001, MSA, FMEA, etc. It has supplied products throughout China, Japan, Thailand, Australia, Germany, Malaysia, the Philippines, Mexico ,the Netherlands, Belgium, and Chile and the United Kingdom, more than 50 countries and regions in the world.We can also optimize the design according to the needs of our customers.According to the structure, different lengths of the ground screw and flanges can be selected.Smart design reduces the difficulty of the installation in most condition.