Atlas Fasteners - the industry leader in Metal Roofing screws. From their Wood Ultimate roofing screws with lifetime warrantee against rust and innovative fully enveloping steel shank, to their more mundane low-profile pancake roofing clip screws. Absolutely the highest quality fasteners for your roofing projects. Innovative solutions backed by performance on every level. Monster Bolts is an authorized dealer for Atlas Fasteners simply because they are the best metal roofing product out there.