1. Qualified for big parts and assemblies.
2. Different materials: Copper, CRS, HRS, stainless steel, Al, al-mag alloy, etc.
3. Different surface treatment: Zinc, copper, chrome, nickel plated, powder coated, etc.
4. Parts or assemblies used for many applications: Auto parts, marine parts, office equipment, department store equipment.
5. Strictest test for each parts and assembly.