Features: 
 A. The lock is a mechanical operation, namely, without electricity; 
 B. Can be set to use the coins to three charges or coin use; 
 C. The full set of locks for the stainless steel manufacturing; 
 D. Specially designed with a key customer, will not repeat, safe; 
 E. Passenger in front of the lock cylinder replacement simple and fast operation; 
 F. With managers key for emergency opening and replace