The security of any mechanical locking security system is dependent upon two very important factors.  The first of these is its physical strength against standard picking, drilling and forcing.  The second being the most important is the controlled duplication of existing keys for that lock or lock system. The facts are that unauthorized key duplication has played a major role in compromising even the most sophisticated security systems.  Tenants, maintenance personnel, and employees with even temporary access to the original keys have no problem getting duplicates made for their own use.  Some employees think they are helping you by making a copy of the "Master Key" so they don't have to bother you every time they need it.  The warning "Do Not Duplicate" stamped on the key is only a challenge for most non-professional key duplicators.

The key to duplication is to restrict where you can purchase blanks from.  High Security lock manufacturers like Medeco & Mul-T-Lock use keys that must be duplicated on a special key cutting machine.  The machines are precision instruments that are not available to purchase by unauthorized people. Medeco & Mul-T-Lock only sell precision machined cylinders and locks to professional security industries .

Medeco & Mul-T-Lock Security products proudly display the name and most times the phone number of the locksmith service that originated the product.

Medeco & Mul-T-Lock continue to protect the unauthorized manufacture and distribution of its restricted key blanks. 

Not every user has the same key control needs.  That's why Pre-Lock has various key control programs in place to meet a wide range of security specifications and key access requirements.