1, the use of screw head pattern such as: a word, cross, triangle, plum, hexagon, H head and so on.
2, the use of screw surface treatment methods such as: nickel, black, zinc plating, white zinc plating, copper plating and so on.
3, the use of screw materials such as: iron, copper, stainless steel and so on.
4, lock screw products such as: plastic, iron, aluminum and so on.
5, Hand-held lock screw machine for the electronic industry auto-assembly line, such as mobile phones, hard drives, keyboards, electronics, toys, electrical appliances, communications equipment, electrical appliances, toys, electronic processing plant assembly.