Chengming copper medium-sized polished copper lock is a product produced by Sanhuan Lock Industry Pujiang Co., Ltd. The lock beam is made of iron electroplated technology, and the lock body and lock core are made of copper. The lock core can also be custom-made with a half copper and half iron core. The lock body is polished to make the surface more glossy and the feeling more smooth. The key is a iron key. It has the characteristics of anti-theft, anti-rust, etc., is safe and reliable, and has extraordinary quality. The wholesale price is negotiable.