Like an historical armourer's workshop,  we use several anvils, hundreds of metal stakes and hammers, drills, grinders and buffing wheels, a super heavy duty worktable (four 2x12s & a 3/8" steel plate with 8x8 supports),  plenty of research sketches (& photos), scores of guides, measurements, and ye old reliable musician...er, radio.  
Photos of nazgul armour being made....enjoy.