Used to connecting the solar panel and fixing it on the rails, make sure the component is installed in the correct position and direction. , with pre-drilled holes, using included bolts accessories for quick and efficient setups. Suitable for uneven surfaces, and the grooves strips making it firmly connecting to perfectly most solar panel. Specifically designs for mounting solar panel on rooftops, boats, wall, garages, and outdoor structures. Package includes: 8Pcs End Clamp