1. The lock materials on the market are basically divided into stainless steel, copper and zinc alloys. door knob sets, Stainless steel has high strength, strong corrosion resistance and no discoloration, and is the best lock-making material; copper is more versatile and has superior mechanical properties.
2. Surface treatment is roughly divided into three types: electroplating, spraying and coloring. Surface treatment is also a standard to measure product quality. Locks with good quality are mostly electroplated.
3. You can feel the quality of the lock with your hands. Generally speaking, for a lock that feels heavy, the heavier it is, the thicker the material used for the lock cylinder. Also pay attention to the three positions of the end of the lock handle, the lock tongue and the four corners of the lock body; a lock with a good lock spring can be opened flexibly, with high sensitivity and a long service life.
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