building materials and tools made of metal, namely, standard panels, normal wedges, normal corner pieces, strengthened panels, strengthened wedges, slabs/panels, special panels, standard and special foundation arch centering centerings, head centerings, hollow centerings, treatment centerings, special centerings, caps straight caps, curved caps, taps for continuous walls, special curved arch centerings, screws, plates, beams, joists, layout patterns, locking spacers, locks for spacers, screw spacers, anchors for levelling, door frame cover for walls, wall stabilizers, struts, telescopic props, overlapping panel fasteners, parapet fasteners, angle joints, anchoring rods, normal door separators, smooth end door separators, lifting carts for positioning and placing panels, stairways, galvanized floors, reinforcing beam for galvanized floors, trapeziums, cotters/gibs, protection rail, protection rail bracing, handrail tube, handrail posts, handrail joints, elevator rails, fixed walkway rail, elevator rail connecting plate, rail stop, spacer for fixed or moving rails, adjustment angle, adjustment angle for inner beams, "U" for the rail stop, "C" of the rail stop, door frames, centering hook, load hook, molding handle, post shores, and hoppers for avoiding spillage while pouring concrete

levelling profiles, level rules, aligning beams