Steel balls; Screws of metal; Metal threaded fasteners; Metal guard rails; Metal bonding fasteners for mounting and demounting of ceiling and wall panels; Metal fasteners, namely, bolts; Metal components for metal protective and security window shutters, namely, slats, shutterboxes, side frames, end caps, crank handles, pull straps, side tracks, ball bearings and installation hardware, namely, rollers, rails, cables, carriers, pins, locks, clips, brackets and screws; Metal clamp-type fastener...