Wire drawing die,nib PCD, CD, ND or tungsten carbide,standard size for copper, steel, Al, carbon wire drawing. 1.We supply with PCD ... use, such as: copper, steel, Al, carbon, etc., according to your request.3,Wire shape can be round, square, spiral or some ... customised irregular shape.4,OEM welcomed.Xiamen Poko Precision Die of Wolfram Steel Tool Co ...