, with pre-drilled holes, using included bolts accessories for quick and efficient setups Specifically designs for mounting solar panel on rooftops, boats, wall, garages, and outdoor structures Used to connecting the solar panel and fixing it on the rails, make sure the component is installed in the correct position and direction Make of aluminum Alloys with anodic oxidation on the surfaces, strong resistance and easy installation Suitable for uneven surfaces, and the grooves strips making it firmly connecting to perfectly most solar panel, Manufacturer: Obotsnoi