Hold-open function 29
The latch bolt controlled locking pin in the centre of the keeper keeps the electric strike unlocked until the door is opened, even after contact has been made.

Electric strike 29
Adjustable keeper (FF, FaFix®), Fail-locked, Hold-open function

Electric strike 29V
Adjustable keeper (FF, FaFix®), Fail-locked, Hold-open function, Elongated screw-on attachment

Electric strike 29E
Adjustable keeper (FF, FaFix®), Mechanical unlocking (E), Fail-locked, Hold-open function

Electric strike 29EV
Adjustable keeper (FF, FaFix®), Mechanical unlocking (E), Fail-locked, Hold-open function, Elongated screw-on attachment