China En 1303 High Security Mortise Euro Profile Standard Door Lock Cylinder Door Lock Brass Cylinder

High Security Cylinder with Construction Key
Construction Key System
Mechanism Of Construction Key:
A Key used by the builder's personnel for a temporary period during construction. And it is permanently voided by the owner when the owner accepts the building(s) from the Contractor by using the owner's construction breakout key. In this case, the owner can have no worry about any other unexpected entry by holding the only correct key access to the lock.
Master Key System
Mechanism Of Master Key System
By Using a master key, you can easily open all locks at home or in office. Moreover, you can control the authorized access of your employees to different doors according to their jurisdiction. The Master key system can be used in any kind of locks.