The Mul-T-Lock patented key and  lock cylinder system raises the level of technology in high security locking to new heights.
 

The key lock system incorporates a high precision moving insert which interacts with a spring loaded pin in the cylinder plug to produce a "virtual combination" only when the key is inserted in the lock.
 

The patented Mul-T-Lock lock key design provides increased control over key blanks, thus discouraging unauthorized key cutting.
 

The lock system has a unique key lock registration card which sets it apart from other lock systems. Locksmiths should only cut replacement keys on production and verification of the registration card.