... carbon steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN, ASTM, BS,JCSI.3. Piece ... numbers: small, medium and large series.4. Process: cast, machining, turning, milling, drilling, ... ,yield stress ,notched bar impact tenacity, x-ray,metallograph.7. Quality control: According to ISO 9001 2001 Stainless Steel Fishing Rod Holder