The products implement GB, DIN, ANSI, BS, and ISO, with strength grade of 4.6-12.9. And the company supplies fasteners special for electric power, expressway guardrail, steel structure, building, petrochemical, and railway, etc, which are exported to about 20 countries in America, Europe, Middle East, and Southeast Asia. The company was ISO9001 certified. Based on the philosophy of quality first service uppermost, the company improves its management standard gradually and serves clients wholeheartedly. Welcome to visit out company and negotiate with us.