Turning tongue lock translates literally into cam lock. Turning tongue lock is widely used. According to its structure, it can be divided into these categories: related articles on locks industry: How to distinguish mechanical lock from other types of password lock now? 1. Triangular turning tongue lock: The core of this kind of turning tongue lock is solid triangle, one-glyph, and square. Their keys are common and wide. Widely used in industrial equipment material is mainly zinc alloy, a small number of occasions using stainless steel material 2, plum marble lock: refers to the internal structure of the lock to control the rotation of the nail is copper marble. This kind of lock has a large size, seven marbles and can reach nearly 10,000 kinds of keys. Safety should be very good. 3. Leaf turning tongue lock: refers to the internal structure of the lock to control the rotation of metal blades (commonly used copper and stainless steel). This kind of turning tongue lock has simple structure and is easy to process. 4. Anti-theft turning tongue lock mailbox lock: This lock can be equipped with three-point steel bolts and connecting rods to realize the function of Space-earth lock (connecting rod lock). It is a kind of easy-to-install magnetic core bullet turning tongue lock, which has the following characteristics: 1. unique lock hole blockage prevention device, dust prevention and foreign body blockage; 2. anti-technical method opening, anti-universal key opening; 3. key can not be personally imitated, it can not be matched in the market; 4. keys between locks can not be opened each other, and a key can be opened. Each lock; 5. Easy installation and low price. The rare earth high-energy permanent magnet material used by the top ten brands of locks in China is small in size and strong in magnetic force. The natural demagnetization in a century is not more than one-tenth of a million. It has permanence and reliability. Can be customized according to customer requirements! Material and surface treatment: The lock body is zinc alloy, the lock surface is polished and chromium-plated; the dial lock tongue is galvanized steel plate. The key is magnetic core key with chrome plated surface.