1. Stainless steel padlock: This type of padlock is characterized by relatively strong oxidation resistance and is suitable for outdoor use. However, due to the difficulty of processing, the cost is relatively high, and it is less used domestically.
2. Copper padlock: The main material of the lock is copper. The most commonly used is the small copper padlock, that is, the size below 40mm, which is mainly due to the relatively high copper price.
3. Iron padlock: It is very common.
A. Electroplated iron padlock: table
B. Grey iron padlock: The surface is treated with grey paint, and many colored padlocks appear after this.
C. Imitation copper padlock: It is actually an electroplated iron padlock, which refers to the surface plated with copper.
4. Zinc alloy padlock: This type of padlock is integrally formed by die-casting machine with high accuracy.
