6 Metal roofing components, namely, rooding and exterior wall panels, holders in the nature of coated or uncoated metal or metal alloys for fixing the metal roofing components, and metal fasteners for the foregoing, namely, halters, nails, nuts, bolts, screws, ridge filler plates, eaves angle-pieces, U-profiles, terminal strips, omega rails, walkway clips; metal upward and laterial extensions for roof coverings, namely drip borders, gutters, snow-catches, hail protectors and vapor barriers, and metal fasteners therfor, namely nuts, bolts and screw