1. Anti-theft: security door locks for sale is an important barrier to protect family property, so pay great attention to its anti-theft properties. At present, good security door locks for sale mostly use steel as the main material, rather than cast iron in the past. The material used in some imported locks is a material called "powder carbon steel", which has super wear resistance and can bring greater security to the home. At the same time, pay attention to the anti-theft level of security door locks For sale, and try to choose a door lock with a high anti-theft level.
2. Wear resistance: related to wear resistance is the material of security door locks For sale. When purchasing, ask the dealer what kind of material it is made of, for example, the difference between cast iron and steel should be noted. Steel is harder and stronger than cast iron, making it easier for thieves to saw and therefore safer.

3. Hand feel: The hand feel of security door locks For sale is determined by the spring, and the quality of the spring determines the hand feel and service life during use. Some lock springs are not good, so it is easy to cause the handle to sag, thus ending the life of the door lock. When purchasing, you should try the toughness of the door lock spring yourself. The feel of a good spring is very soft, neither too soft nor too hard.
4. Coating: In the purchase process, it is also necessary to look at the coating of security door locks For sale, that is, consider whether the handle of the door lock will fade. Generally speaking, the protective layer of a good door lock, that is, the plating layer, will not be easily oxidized and worn. The coating of the door lock handle is related to the overall aesthetics of the room, so this cannot be ignored.