These corrugated roof sheets are made from high quality steel with a charcoal black coating for greater water, corrosion and rust resistance, making them durable even when used outdoors. These corrugated roof panels are not pre-drilled and require you to drill the holes yourself (please be careful not to get scratched by the edges when drilling the holes yourself), come with 50 screws and are ideal for use in garden tool sheds, garages, workshops, etc., and can be used not only as a roof, but also as a wall for your garden tool shed.