Fail-locked 118® ProFix® 1
The door can only be opened while contact is made. When operated with an alternating current, a buzzing sound can be heard. There is no buzzing sound with direct current operation.

Electric strike 118.10
Adjustable keeper (FF, FaFix®), Fail-locked

Electric strike 118E.10
Adjustable keeper (FF, FaFix®), Mechanical unlocking (E), Fail-locked

Electric strike 118.50
Adjustable keeper (FF, FaFix®), Fail-locked, Bi-directional diode

Electric strike 118.60
Adjustable keeper (FF, FaFix®), Monitoring contact (RR), Fail-locked, Bi-directional diode