Further information for Eff Eff Fritz Fuss 875-10-------00 - EFF 875 10 00 BAR SADDLE LTKONTAKT UNIVERSAL forend
The closed housing shape means that the bolt cutout is closed at the back, especially in steel frames and profiles. The interior of the profile is not visible. The bolt switch contact is first mounted on the strike plate, then the strike plate is attached to the frame.