high grade stainless steel, after shot blasting surfaces, not easy to be oxidized, delaying the metal rate Easy installation: Can be installed from any position of the aluminium alloy extrusion guide, flexible installation, bolt connection, no need to drill and welding, fast and time-saving The hooks are of the roof for the installation of aluminium rails, profile rails, mounting rails for mounting Photovoltaic modules or solar energy systems Suitable for installing the solar photovoltaic module bracket on various surfaces and steel roof It can meet the needs of different roof structures Suitable for all kinds of framed solar panel to install on various types of roofs, Manufacturer: JAZUAIAO