The copper material is wear-resistant. Compared with other materials, the lock core is much better in terms of performance. The aluminum lock core is a low-cost representative, not wear-resistant, and not fireproof; the iron lock core is fireproof, not wear-resistant, difficult to process, but fireproof. Not bad. The copper lock core is wear-resistant and easy to process. It is not fireproof. Compared with iron, it is soft and easy to open. Not enough iron safety.