Class B lock

- Mar 08, 2019-

The B-class lock key is a flat-panel key with a double-row marble slot, which has a row of curved irregular lines than the A-level lock key face. The main types of lock cylinders are computer double-row lock cylinders, double-row crescent lock cylinders, double-sided vane lock cylinders. The B-level lock-proof technical opening time is 5 minutes, and the mutual opening rate is high. With a strong twist tool, the lock cylinder can be opened in 1 minute.