The materials used are zinc alloy, copper, aluminum, stainless steel, etc. In order to match different styles of furniture, the shape and color of handle are different and colorful. The handle of electroplating and electrostatic painting has wear resistance and corrosion resistance. When buying, in addition to the interior decoration style, it should also be able to bear a large tension, generally can bear more than 6 kg of tension. Generally, copper lock, stainless steel lock, alloy lock and other materials are used. The door lock is divided into three categories in function: 1. Multi point door lock. Two spinning handle (seven word handle). External flat window connecting handle. The most common application range of multi-point lock is also the most widely. Purpose: flat windows, sliding doors and curtain wall hanging windows inside and outside the family, office and business buildings. From the external point of view, the multi-point lock handle can be divided into: A, fork pulling handle. Square shaft handle. Handle on both sides.