You are here: PRODUCTS / Electric Strikes / Standard applications / Model 17®, 27, 37 / Fail-unlocked 37 Fail-unlocked 37 The electric strike is locked for as long as the power is on. If the power is switched off or if there is a power cut, the electric strike latch can be moved and the door can be opened. Electric strike 37Electric strike FaFix® adjustment range, Fail-unlocked Electric strike 37RRElectric strike FaFix® adjustment range, Monitoring conta… Electric strike 3705Electric strike FaFix® adjustment range, Diode (05), Fail…