Type : Out Side Control Lock With Several Front Locks
Finishing : Polished
Feature : Durable
Color : Metallic
A consists number of basic units type DL locks fixed to a steel box. The box houses a mechanism arranged such that certain keys are wrapped when others are removed. Its simplest form a control key is trapped until all other keys have been returned to their respective exchange boxmore...
This Key Exchange Box is used as an exchange between a control switch key and number of access door keys, it ensures that all the access doors must be locked and their respective keys trapped in the Exchange Box before the control or master key can be freed. The Exchange Box is smore...