The materials used are zinc alloy, copper, aluminum, stainless steel, etc. In order to cooperate with different styles of furniture, the shape and color of handle are various and colorful. The handle after electroplating and electrostatic spray painting has the function of wear resistance and corrosion resistance. When purchasing, it should be able to bear a large pull force, generally more than 6kg, in addition to conforming to the interior decoration style. Usually use copper lock, stainless steel lock, alloy lock and other materials. Door locks can be divided into three categories: 1. Multipoint door locks. Two spinning handle (seven character handle). The external casement windows are linked to handle. And the most common application range of multipoint lock is also the most extensive. Purpose: all interior and exterior casement windows of home, office and business buildings, interior sliding doors and hanging windows on curtain walls. From the external point of view, multi-point lock handle can be divided into: A, fork pulling handle. Square shaft handle. Both sides.