1.Core: Natural diamond 2.Case: Stainless steel 3.Implemented as drawing tools for soft and hard wire Natural Diamond ... steel,tungsten and copper platedsteel wire etc.).Suitable for drawing platinum rhodium wire,gold wire,silver wire,copper,aluminum, molybdenum,nickel,tined ... cord,iron and other nonferrous metal wire material.Specification:Hole size: 0.03mm—1.00mm Case size: 25x12mm,28x11mm,30x15mm ...