Tooth lock (window lock) is widely used in plastic steel aluminum alloy sliding window. The hardware for opening and closing the sliding window is the crescent lock. Because it looks like a crescent moon, insiders call it a crescent moon lock. The crescent lock not only has the function of opening and closing, but also has the function of anti-theft to a certain extent. The appearance of crescent lock generally includes painting, baking, spraying, electroplating, etc. Most of them are white and aluminum. Crescent locks have various styles and varieties. The high-quality crescent lock has a heavy feeling when you put it in your hand; The appearance is smooth without pitting; Generally, the crescent lock can rotate 180 degrees (some can rotate 360 degrees). The high-quality crescent lock is flexible and free to rotate. It has no sound and good elasticity; Turn to the back and observe that most of the good crescent locks are of spring structure. The center is made of galvanized material, which is not easy to rust; Observed from the thickness of the material, it is relatively thick. The inferior crescent lock of the same size is light and small by hand. Its appearance is dim. It is generally not very flexible to open. After a long time of use, it is easy to get stuck and loose, which greatly reduces the performance of opening, closing and anti-theft. There are long handle, short handle, inclined handle, etc. in the design of crescent lock.
A good crescent lock not only brings the safety of doors and windows, but also a small ornament on doors and windows.