Review on CMYYANGLIN Solar Panel Mounting Brackets ABS Corner Bracket Kit 7PCS for RVs, Caravans, Vehicles, Camper Vans, Sheds, Garages, Boats – Drill-Free Installation, White by Aaron Jensen

Pretty harsh environments. I would like more flange surface for adhesive mounting. People complain that stainless steel screws break, so I bought stainless steel self-tapping screws. They broke. Rschunimagu. Because of the 3-ply extrusion at the corners of my frames, I decided to pre-drill holes for the self-tapping screws. I broke off a drill before slowing down. It helped that the 2nd punch was sharp. Overall they met my needs and after realizing the need for pre-drilling I was able to complete my project.